Thursday

July 28, 2016
Number of results: 103,390

**physics**

A motorboat whose speed in still water is 3.00 m/s must aim upstream at an angle of 27.0^\circ (with respect to a line perpendicular to the shore) in order to travel directly across the stream. What is the speed of the current?
*September 21, 2010 by Mark*

**Anonymous**

A motorboat whose speed in still water is 2.86 m/s must aim upstream at an angle of 25.4 degrees (with respect to a line perpendicular to the shore) in order to travel directly across the stream.What is the resultant speed of the boat with respect to the shore?
*February 11, 2013 by Anonymous*

**Physics**

A motorboat whose speed in still water is 2.91 m/s must aim upstream at an angle of 30.0 degrees (with respect to a line perpendicular to the shore) in order to travel directly across the stream. - What is the speed of the current? - What is the resultant speed of the boat ...
*May 27, 2016 by Alyssa*

**math/physics**

A motorboat whose speed in still water is 3.00 m/s must aim upstream at an angle of 27.0 degrees (with respect to a line perpendicular to the shore) in order to travel directly across the stream. What is the speed of the current?
*September 21, 2010 by cindy*

**physics **

A boat, whose speed is 1.75 m/s must aim upstream at an angle of 26.3 degrees ( with respect to a line perpendicular to the shore) in order to travel directly across the stream?
*September 12, 2013 by Izzy*

**Math**

A river flows at the rate of 2 mph. If a motorboat can travel 12 miles upstream and return in a total of 2.5 hours, what is the speed of the motorboat in still water?
*April 11, 2011 by Anonymous*

**math**

a motorboat takes 5 hours to travel 45km downstream and then 18 km upstream on a river whose current flow of the rate of 3 km/hr. how fast can the boat travel in still water?
*March 6, 2013 by sofia*

**physics**

You are riding on a jet ski at an angle upstream on a river flowing with a speed of 2.8 m/s. Suppose the jet ski is moving at a speed of 18 m/s relative to the water. (a) At what angle must you point the jet ski if your velocity relative to the ground is to be perpendicular to...
*May 14, 2007 by micole*

**physics**

A boat’s speed in still water is vBW = 1.85 m/s. If the boat is to travel directly across a river whose current has speed vWS = 1.20 m/s, at what upstream angle must the boat head?
*November 15, 2011 by ahmed*

**calculus**

Nikki is driving a motorboat across a river that flows at 5 m/s. The motorboat has a speed of 12 m/s in still water. She heads out from one bank in a direction perpendicular to the current. How far does she travel in 3 minutes?
*August 16, 2014 by Liz*

**Math**

A boat, whose speed in still water is 2.80m/s , must cross a 280m wide river and arrive at a point 120m upstream from where it starts. To do so, the pilot must head the boat at a 45.0 degrees upstream angle. What is the speed of the river's current?
*September 12, 2009 by Anne*

**Physics**

At what upstream angle must the swimmer aim, if she is to arrive at a point directly across the stream of a 42-m-wide river whose current is 0.50 m/s? A swimmer is capable of swimming 0.62m/s in still water.
*September 15, 2015 by Anonymous*

**physics**

A boat’s speed in still water is 1.80 m/s . The boat is to travel directly across a river whose current has speed 1.20 m/s . Determine the speed of the boat with respect to the shore.
*February 9, 2016 by JerkyBerky*

**physics**

A motor boat whose speed is 2.6 m/s in still water, needs to point upstream at an angle of 28.5 in order to travel straight across the river. Calculate the speed of the current and the resultant velocity of the boat across the river.
*June 24, 2014 by jane*

**Physics**

A boat’s speed in still water is 1.95m/s . The boat is to travel directly across a river whose current has speed 1.20m/s . Determine the speed of the boat with respect to the shore. Despite, I did it like taking the sqrt (1.95^2+1.20^2) is there something wrong I did? ...
*October 17, 2012 by Kaan*

**Physics**

A boat must cross a 260-m-wide river and arrive at a point 110 upstream from where it starts. To do so, the pilot must head the boat at a 45 degree upstream angle. THe current has speed 2.3 m/s. a) What is the speed of the boat in still water? b) How much time does the journey...
*February 5, 2013 by Chris*

**Algebra**

A riverboat cruise line has a boat that can travel 76 mi downstream in the same time that it takes to travel 52 mi upstream. The speed of the current in the river is 1.5 mph. Find the speed of the boat in still water.
*March 7, 2011 by Paula*

**Physics**

A motorboat travels at a speed of 40 km/h relative to the surface of the water. If it travels upstream against a current of 12 km/h what is the boats speed relative to the shore?
*April 15, 2011 by aj*

**physics**

Sheena can row a boat at 2.90 mi/h in still water. She needs to cross a river that is 1.22 mi wide with a current flowing at 1.55 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream. (a) What is her speed with respect ...
*September 13, 2012 by Christina*

**physics**

Sheena can row a boat at 3.13 mi/h in still water. She needs to cross a river that is 1.10 mi wide with a current flowing at 1.75 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream. (a) What is her speed with respect ...
*September 8, 2013 by Megan*

**PHYSICS**

Sheena can row a boat at 2.91 mi/h in still water. She needs to cross a river that is 1.24 mi wide with a current flowing at 1.54 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream. (a) What is her speed with respect ...
*January 31, 2012 by Anonymous*

**physics**

Trevor can row a boat at 3.00 mi/hr in still water. He needs to cross a river that is 1.20 miles wide with a current flowing at 1.60 mi/h. Not having his calculator ready, he guesses to go straight across, he should head 60.0 degrees upstream with respect to straight across. a...
*October 2, 2012 by lib*

**PHYSICS**

Sheena can row a boat at 2.91 mi/h in still water. She needs to cross a river that is 1.24 mi wide with a current flowing at 1.54 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream. (a) What is her speed with respect ...
*January 30, 2012 by Anonymous*

**Please help**

A motorboat can travel upsteam on a river at 18km/h and downsteam at 30km/h. How far upstream can the boat travel if it leaves at 8:00am and must return by noon?
*January 3, 2013 by Ashley*

**Physics**

A boat that can travel at 4.0 km/hr in still water crosses a river with a current of 1.8 km/h. at what angle must the boat be pointed upstream to travel straight across the river? Confused on how to even set it up!
*September 12, 2010 by Ali*

**physics**

A 410-m-wide river has a uniform flow speed of 2.0 m/s through a jungle and toward the east. An explorer wishes to leave a small clearing on the south bank and cross the river in a powerboat that moves at a constant speed of 7.9 m/s with respect to the water. There is a ...
*September 24, 2012 by Hannah*

**Math**

a motorboat can go 24 miles downstream in the same amount of time that it takes to go 12 miles upstream. The boats speed in still water is 12 mph. What is the speed of the river? mi/hr?
*April 5, 2012 by Nancy*

**math (algerba 1)**

A motorboat can travel upstream on a river at 18km/h and downstream at 30km/h. How far upsteam can the boat travel if it leaves at 8am and must return by noon?
*January 2, 2013 by Kate*

**math (algerba 1)**

A motorboat can travel upsteam on a river at 18km/h and downsteam at 30km/h. How far upstream can the boat travel if it leaves at 8:00am and must return by noon?
*January 3, 2013 by Ashley*

**Algebra**

2 hour 40 min after a raft left pier A and traveled downstream, a motorboat left pier B and traveled upstream toward the raft. The two met 27 km away from B. Find the speed of the raft if the speed of the motorboat in still water is 12 km/hour and the distance from A to B is ...
*April 3, 2016 by Alec*

**physics**

You are riding in a boat whose speed relative to the water is 4.7 m/s. The boat points at an angle of 24.4° upstream on a river flowing at 13.1 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 25.9 m wide.
*September 10, 2012 by Anonymous*

**physics**

You are riding in a boat whose speed relative to the water is 4.7 m/s. The boat points at an angle of 24.4° upstream on a river flowing at 13.1 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 25.9 m wide.
*September 10, 2012 by Anonymous*

**physics**

You are riding in a boat whose speed relative to the water is 6.9 m/s. The boat points at an angle of 25.0° upstream on a river flowing at 15.1 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 26.5 m wide.
*August 1, 2013 by LouLou*

**physics**

You are riding in a boat whose speed relative to the water is 4.5 m/s. The boat points at an angle of 25.1¡ã upstream on a river flowing at 12.8 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 26.2 m wide.
*October 7, 2013 by regina*

**physics**

You are riding in a boat whose speed relative to the water is 7.4 m/s. The boat points at an angle of 24.8° upstream on a river flowing at 15.2 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 26.1 m wide.
*August 9, 2014 by Danielle*

**college-Physics**

Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive direction, an observer ...
*September 24, 2008 by Tristan*

**Physics**

Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive direction, an observer ...
*September 24, 2008 by Tristan*

**physics**

Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive direction, an observer ...
*September 24, 2008 by Tristan*

**Physics 114**

You are riding in a boat whose speed relative to the water is 7.2 m/s. The boat points at an angle of 25.7° upstream on a river flowing at 14.1 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 24.5 m wide.
*October 15, 2011 by Anmol*

**Physics**

Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive direction, an observer ...
*February 19, 2012 by Anonymous*

**math urgent**

a motorboat takes 4 hrs to travel 256 miles going upstream. the return trip takes 2 hours going down stream. what is the rate of the boat in still water and what is the rate current. rate of the boat in still water=mi/hr rate of the current=mi/hr
*November 29, 2010 by mandy*

**math**

A boat takes 90 minutes less to travel 36 km downstream then to travel the same distance upstream.If the speed of the boat in still water is 10 kmph.What is the speed of the current?
*June 21, 2014 by sangita*

**Physics **

A child in danger of drowning in a river is being carried downstream by a current that has a speed of 2.35 km/hr. The child is 0.625 km from shore and 0.800 km upstream of a boat landing when a rescue boat sets out. If the boat proceeds at its maximum speed of 18.6 km/hr ...
*February 5, 2012 by Hoss*

**Algebra 2**

how would you solve: the current in the river flowed at 3 mph. The boat could travel 24 mph downstream in half the time it took to travel 12 mi upstream. what was the speed of the boat in still water? please help. The time required to go any distance upstream a distance L is L...
*June 18, 2006 by Jonathan*

**intermediate algebra**

a motorboat moves 25 miles per hour in still water. it travels 21 miles upstream and 21 miles downstream in a total time of 2.0 hours. whatis the speed of the current?
*October 6, 2013 by Ernie*

**Math! Algebra 1! **

A boat is traveling in a river with a current that has a speed of 1.5 km/h. In one hour, the boat can travel twice the distance downstream as it can travel upstream. How long will it take the boat to travel 100 km in still water?
*November 10, 2014 by Dede*

**algebra-NOW PLEASE**

A boat is traveling in a river with a current that has a speed of 1.5 km/h. In one hour, the boat can travel twice the distance downstream as it can travel upstream. What is the boat's speed in still water?
*December 4, 2012 by Alex*

**physics**

A boat can travel at a speed of 8km/h in still water on a lake.In flowing water of a stream, it can move at 8km/h relative to the water in the stream.If the stream speed is 3km/h, how fast can the boat travel upstream and downstream?
*October 8, 2008 by Vanessa*

**math(algebra)**

a boat can travel at a speed of 15 kph in still water. the boat travels 40 km downstream in a river at the same time it takes to travel 25 km upstream. what is the speed of the river?
*August 31, 2015 by daniela*

**physics**

A boat crosses a river, which is 60 meters wide in 15 seconds. Upon crossing, the boat, which had headed straight across the river, ended up 20 meters downstream. A). What was the speed of the boat in still water? B). At what speed does the river flow? C). At what angle should...
*September 27, 2009 by Dreskillz89*

**math, physics**

A motorboat goes upstream on a river and covers the distance between two towns on the riverbank in 6 hours. It covers this distance downstream in 5 hours. If the speed of the stream is 1.5 km/h, find the speed of the boat in still water. [This problem is challenging.
*November 10, 2015 by sophie*

**Maths**

A river flows at 3km/h. At what speed must a boat travel in order to make a 35km trip upstream in a time of 50 minutes? How long will it take the boat to make the return trip downstream? (Assume the boat retains the speed travelled upstream) Working out please
*October 6, 2011 by Babiinoob*

**physics**

a motorboat travels 25.0 km/h in still water. what will be the magnitude and direction of the velocity of the boat if it is directed upstream on a river that flows at the rate of 4.00 km/h?
*August 4, 2011 by Anonymous*

**Vectors**

I hope that the diagram I have drawn for myself matches the one in your question. I have a triangle with sides 20 and 10 and an angle of 120º between them By the cosine law I found the third side to be 26.4575. You said you found the maginitude, I hope we match. After that, ...
*April 20, 2007 by Reiny*

**RATE, DISTANCE, TIME**

TIM PADDLED HIS KAYAK 12 KM UPSTREAM AGAINST A 3 KM/H CURRENT AND BACK AGAIN IN 5 HR 20 MINUTES. iN THAT TIME HOW FAR COULD HE HAVE PADDLED IN STILL WATER 12/(v+3) + 12/(v-3) = 5.33 hours Solve for this speed in still water, v. 12(v-3) + 12(v+3) = 5.33 (v^2 -9) 24 v = 5.33 v^2...
*December 21, 2006 by CINDY*

**physics**

(b) The current in a river flows at 1.51 ms-1 relative to the shore. A swimmer with a velocity of 3.76 ms-1 relative to the water wishes to swim directly across the river. At what angle to the shore should the swimmer head in order to arrive directly opposite on the other bank...
*August 21, 2014 by shoushanik*

**Physics**

A child in danger of drowning in a river is being carried downstream by a current that has a speed of 2.60km/h. The child is 0.615km from shore and 0.815km upstream of a boat landing when a rescue boat sets out. If the boat proceeds at its maximum speed of 21.2km/h relative to...
*September 18, 2015 by Lash*

**maths**

22. A motor boat whose speed is 18 km/h in still water takes 1 hour more to go 24 km upstream than to return downstream to the same spot. Find the speed of the stream
*March 6, 2010 by kaur*

**math algebra**

Paul Websters motorboat can travel 15 mph in still water. Traveling with the current of a river, the boat can travel 20 miles in the same time it takes to go 10 miles againt the current. Find the speed of the current.
*April 23, 2013 by alms*

**Math word problem check**

The Mad River flows at a rate of 3 km/h. In order for a boat to travel 78.2 km upriver and then return in a total of 8 hr, how fast must the boat travel in still water? what formula would be used to solve this problem? I used the formula of V = D/T T = D/V, you know that 78.2...
*November 9, 2008 by Shawn*

**Physics **

Vanessa can swim 3.0 m/s in still water. While trying to swim directly across a river from west to east, Vanessa is pulled by a current flowing southward at 2.0 m/s. A) What is the magnitude of Vanessa’s resultant velocity? B) If Vanessa wants to end up exactly across stream ...
*October 20, 2013 by Kailey*

**Physics **

Vanessa can swim 3.0 m/s in still water. While trying to swim directly across a river from west to east, Vanessa is pulled by a current flowing southward at 2.0 m/s. A) What is the magnitude of Vanessa’s resultant velocity? B) If Vanessa wants to end up exactly across stream ...
*October 20, 2013 by Kailey*

**Trig**

A swimmer heads perpendicular to a 2-miles-per-hour current. His speed in still water is 1.8 miles per hour. Find the actual speed of the swimmer and his direction angle, 0 (the zero right her is supposed to have a line through the middle of it, I think it means cosine or ...
*May 10, 2010 by MEGGG!!!*

**Physics**

Veronica can swim 3.0 m/s in still water. While trying to swim directly across a river from west to east,? Veronica is pulled by a current flowing southward at 2.0m/s. a) What is the magnitude of Vernoicas resultant velocity? b) If Veronica wants to end up exactly across the ...
*November 13, 2011 by Zady*

**Trig**

A swimmer heads perpendicular to a 2-miles-per-hour current. His speed in still water is 1.8 miles per hour. Find the actual speed of the swimmer and his direction angle, 0 (the zero right here is supposed to have a line through the middle of it, I think it means cosine or ...
*May 10, 2010 by MEGGG!!!*

**chemistry**

assuming complete dissociation of the solute, how many grams of \rm KNO_3 must be added to 275 \rm mL of water to produce a solution that freezes at -14.5 ^\circ {\rm C}? The freezing point for pure water is 0.0 ^\circ {\rm C} and K_f is equal to 1.86 ^\circ {\rm C}/m.
*February 6, 2012 by a*

**Math**

Steve can kayak at 8 km/h in still water. On the river, Steve and the kayak travel slower upstream due to the current. It takes him 1.5 h for a trip downstream, but 3.25 h for the same distance upstream. Determine the speed of the river’s current.
*June 19, 2013 by Maggie*

**Math (urgent) hw due tommorow!**

The speed of a stream is 3 km/h. A boat travels 25 km upstream in the same time it takes to travel 35 km downstream. What is the speed of the boat in still water?
*August 30, 2010 by anj*

**MATH**

In still water, a speed boat travels 5 times faster than the current of the river. If the speed boat can travel 48 miles upstream and 10 back in 5 hours, find the rate.
*January 7, 2016 by Jane*

**Physics**

A boat can travel 2.85 m/s in still water. If the boat points its bow directly across stream whose current is .95 m/s, what is the velocity of the boat relative to the shore?
*November 13, 2011 by Anonymous*

**Intermediate Algebra**

The speed of a boat in still water is 29mph. if the boat travels 140mph downstream in the same time that it takes to travel 92miles upstream, find the speed of the stream.
*December 2, 2012 by Wanda*

**Physics**

Swimming at 3.00 m/s relative to still water, a swimmer heads directly across a river of width 80 m. He arrives 50 m downstream from the point directly across the river from his starting point. (a) What is the speed of the current in the river? (b) At what angle relative to ...
*June 5, 2016 by Ryan Tye*

**Physics Dynamics**

Swimming at 2.00 m/s relative to still water, a swimmer heads directly across a river of width 80 m. He arrives 35 m downstream from the point directly across the river from his starting point. (a) What is the speed of the current in the river? (b) At what angle relative to ...
*February 12, 2015 by Anonymous*

**physics**

A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock. A rescue boat with speed 24.8 km/hr (with respect to the water) sets off from the dock at the ...
*September 17, 2011 by aaa*

**physicsssss**

A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0.6 km from the shore and 2.5 km upstream from the dock. A rescue boat with speed 24.8 km/hr (with respect to the water) sets off from the dock at the...
*September 21, 2011 by aaa*

**physics**

The velocity of a boat with respect to the shore is 2 meters/second. The velocity of the water with respect to the shore is 1 meter/second. What is the distance traveled by boat after 3 minutes if the boat is traveling in the opposite direction of the water? (Hint: Find the ...
*April 19, 2013 by kiandra*

**physics**

The velocity of a boat with respect to the shore is 2 meters/second. The velocity of the water with respect to the shore is 1 meter/second. What is the distance traveled by boat after 3 minutes if the boat is traveling in the opposite direction of the water? (Hint: Find the ...
*May 7, 2013 by Anonymous*

**algebra**

a boat goes 16 Km upstream and 24 Km downstream in 6hrs.it can go 12Km upstream and 36 Km in same time.find the speed of boat in still water and speed of the stream
*September 5, 2010 by sara*

**algebra**

a boat goes 16 Km upstream and 24 Km downstream in 6hrs.it can go 12Km upstream and 36 Km in same time.find the speed of boat in still water and speed of the stream
*September 5, 2010 by sara*

**UPSTREAM**

THIS EXURSION WITH A BOAT TRAVEL 35KM UPSTREAM AND THEN BACK AGAIN IN 4 H 48 MINUTRE. iF THE SPEED OF THE BOAT I5 K,/H, WHAT IS THE SPEED OF THE CURRENT? Let v be the speed of the current. The boat's speed upstream (relative to the land) is 15-v and the speed downstream is 15+...
*December 21, 2006 by CINDY*

**Physics-Mechaincs**

A rowboat crosses a river with a velocity of 1.01 m/s at an angle 30◦ North of West relative to the water. Water’s frame of reference: speed of boat: 1.01 m/s direction from current: 30◦ The river is 322mwide and carries a current of 1.63 m/s due East. Shore’s ...
*September 19, 2010 by Genevieve*

**math**

The speed of a stream is 6 mph. If a boat travels 52 miles downstream in the same time that it takes to travel 26 miles upstream, what is the speed of the boat in still water?
*July 22, 2012 by john*

**Algebra**

You travel with a boat 90 km downstream with the current in 6 hours and back upstream in 10 hours. Find the speed of the stream and the speed of the boat in still water, assuming that the motion is uniform.
*December 7, 2015 by Bob*

**math**

A boat travels 8km upstream and back in 2 hours. If the current flows at a constant speed of 3km/h, Find the speed of the boat in still water.(when the boat goes upstream, it speed reduces by 3km/h, and when going downstream, its speed increases by 3 km/h)
*January 15, 2013 by zshen*

**Math**

in still water, a speed boat travels 5 times faster than the current of the river. If the speed boat can travel 48 miles upstream and then back in 5 hours, find the rate of the current.
*January 6, 2016 by Amy*

**Math**

in still water, a speed boat travels 5 times faster than the current of the river. If the speed boat can travel 48 miles upstream and then back in 5 hours, find the rate of the current.
*March 7, 2016 by Amy*

**math**

The speed of a river current is 4 mph. IF a boat travels 20 miles downstream in the same time that it takes to travel 10 miles upstream, find the speed of the boat in still water.
*April 15, 2016 by takeeyah*

**physics**

Draw a diagram to scale showing the direction in which a man must row across a river in order to reach a point directly opposite, if he rows 3 mile/hr while the speed of current is 2 mile/hr. My ans- with angle of 33' with straight line he wants to travel. And V=3.6 mile/hr. ...
*July 4, 2015 by jzee11*

**Algebra**

A tourist traveled on a motorboat against the current for 25 km. And then returned back on a raft. In the boat the tourist traveled for 10 hours less than on the raft. Find the speed of the current if the speed of the motorboat in still water is 12 km/hour.
*March 22, 2016 by Andrew*

**Algebra**

A tourist traveled on a motorboat against the current for 25 km. And then returned back on a raft. In the boat the tourist traveled for 10 hours less than on the raft. Find the speed of the current if the speed of the motorboat in still water is 12 km/hour.
*March 25, 2016 by Sean*

**Algebra**

The speed of the current is 4kph. A boat travels 6km upstream in the same time it takes to travel 10km downstream. What is the spees of the boat in still water?
*September 12, 2015 by Sammy*

**Algebra**

The speed of the current is 4kph. A boat travels 6km upstream in the same time it takes to travel 10km downstream. What is the spees of the boat in still water?
*September 12, 2015 by Sammy*

**Math**

A boat, which moves at 18 mph in still water, travels 14 miles downstream in the same amount of time it takes to travel 10 miles upstream. Find the speed of the current.
*July 27, 2011 by Antione*

**Math**

In trapezoid $ABCD$, $\overline{BC} \parallel \overline{AD}$, $\angle ABD = 105^\circ$, $\angle A = 43^\circ$, and $\angle C = 141^\circ$. Find $\angle CBD$, in degrees.
*April 22, 2016 by justarandomboy*

**Math**

The mad river flows at a rate of 2 KM/H. In order for a boat to travel 79.2 KM of River and then return in a total of eight hours how fast must about travel in Still water?
*April 15, 2014 by Anthony*

**maths**

A boat goes 12 km upstream and 40 km downstream in 8 hours. It can go 16 km upstream and 32 km downstream is the same time. Find the speed of the boat in still water and the speed of the stream.
*June 4, 2014 by raghav*

**algebra**

A motorboat can maintain a constant speed of 24 mph relative to the water. The boat makes a trip upstream to a certain point in 62 minutes. the return trip takes 34 minutes. What is the speed of the current?
*September 20, 2011 by Wen*

**physics - relative motion**

A ferryboat, whose speed in still water is 4.00m/s, must cross a river whose current is 3.00m/s. The river runs from west to east and is 128m wide. The boat is pointed north. a) If the boat does not compensate for the flow of the river water and allows itself to be pushed off ...
*December 18, 2012 by Leo*

**math **

need help. Young salmon hatch in freshwater steams and then migrate downstream to the ocean at the rate of 70 miles in 8 hours. there they live until they reach spawning age. then they return upstream to fresh water to spawn and usually die soon after. on the upstream trip, ...
*February 7, 2011 by alicia*

**Math**

How do you set this up? Solve the system using substitution: A boat travels 18 miles downstream in 1.5 hrs. It then takes the boat 3 hrs. to travel upstream the same distance. Find the speed of the boat in still water and the speed of the current. Thanks you!!!
*December 6, 2012 by Erin*