Thursday

July 31, 2014

July 31, 2014

Number of results: 286

**Algebra**

Manuel has a boat that can move at a speed of 30 kn/h in still water. He rides 280 km downstream in a river in the same time it takes to ride 70 km upstream. What is the speed of the river?
*November 3, 2010 by Dusty*

**Physical Science**

Trying to figure this out and can't: The elevation of a streambed is surveyed near a bridge to be 2,367m. At another bridge 12.2km downstream the elevation is 2,232m. What is the gradient of this stream?
*April 21, 2012 by mel*

**Math**

3). Sam rows up a river to camp in three hours. The next day he makes the return trip downstream in one hour. If he can row two mph in still water, how fast is the current?(The question was not answered last time).
*December 13, 2010 by Sherkyra8645*

**college physics**

A swimmer is heading straight for the other shore of a river with a velocity of vs=0.7 m/s relative to the water, but is carried away by the current, which has a velocity of vr=0.3 m/s. It takes her 20.3 s to get across. How far downstream does she end up? Can someone please ...
*September 22, 2010 by kim*

**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*

**college physics**

A swimmer is heading straight for the other shore of a river with a velocity of vs=0.7 m/s relative to the water, but is carried away by the current, which has a velocity of vr=0.3 m/s. It takes her 20.3 s to get across. How far downstream does she end up? Can someone please ...
*September 20, 2010 by Kelly*

**Algebra**

Boat travels 10 mi upstream and 10 mi downstream the stream is moving 1mph and the boat took 5 1/3hrs. What is the speed of boat if the stream still?
*October 28, 2010 by Teresa*

**science**

a boat is traveling with a velocity of 5 km/hr upstream. The river is flowing at a velocity of 2km/hr downstream. What is the velocity of the boat compared to the riverbank? ►
*January 28, 2011 by john*

**math**

A tugboat can go 10 miles upstream in the same time as it can go 15 miles downstream. If the tugboat goes 12 miles per hour in still water, what is the speed of the current?
*October 27, 2010 by Dave*

**Algebra**

Briana can row 4 miles per hour is still water. It takes as long to row 8 miles upstream as 24 miles downstream. How fast is the current?
*January 14, 2014 by Urgent*

**College Chemisty**

The pH of water collected in a stormwater run-off downstream from a Union Carbide chemical factory is 4.82. Calculate the H+ ion concentration of rainwater. The problem may start with: pH= -log H+ = 4.82. The answer is 1.5x10 power -5. Again, Can you please show steps for maths.
*October 22, 2010 by Elleni*

**Math**

Boat travels 10 mi upstream and 10 mi downstream the stream is moving 1mph and the boat took 5 1/3hrs. What is the speed of boat if the stream still? I need help ASAP!!!! PLEASE!!!
*October 28, 2010 by Teresa*

**Physics**

if the water in the river moves downstream at 4mi/hr heading the boat straight across the river, what direction will the boat move relative to the shore? i dont want the answer... i want someone to explain. i wanna learn
*October 16, 2013 by Carlos*

**Math**

Steve's boat will go 14 miles per hour in still water. If he can go 13 miles downstream in the same amount of time as it takes to go 10 miles upstream, then what is the speed of the current? (Please round your answer to one decimal place.)
*July 24, 2012 by Josh*

**physics**

Noah wants to swim across a river 10 m wide, flowing from north to south. He swims so his velocity with respect to the river is 2 m/s due east, and the river moves at 4 m/s. How far downstream in m from his starting point will he reach the other side?
*June 22, 2013 by raja harishchandra*

**physics**

Noah wants to swim across a river 10 m wide, flowing from north to south. He swims so his velocity with respect to the river is 2 m/s due east, and the river moves at 4 m/s. How far downstream in m from his starting point will he reach the other side?
*June 22, 2013 by raja harishchandra*

**MATH 12U**

Mary leaves a dock paddling her canoe at 3m/s. She heads downstreamat an angle of 30 degrees to the current which is flowing at 4 m/s. a) How far downstream does Mary travel in 10s? b) What is the length of time required to cross the river ifits width is 150 m?
*February 24, 2011 by Kevinn*

**math**

A boat traveling downstream a distance of 39 miles then came right back.If the speed of the current was 12 mph and the total trip took 4 hours 20 minutes,find the average speed of the boat relative to the water.
*February 1, 2014 by russ*

**PHYSICS!!!**

A boat moves at 7.00m/s relative to the water. (You can neglect relativity at these slow speeds.) The boat travels 100 m downstream and then 100 m upstream, returning to its original point. Find the time for the round trip
*April 3, 2014 by Amy*

**physics**

a crew member is walking on a tugboat that is pulling a barge. the tugboat is moving at a constant speed upstream in a river that has a constant downstream current. In the situation above, what is at rest relative to the tugboat?
*February 2, 2014 by judy*

**algebra**

A boat travel 4 miles upstream with a current of 5 miles per hour. It takes 40 mminutes longer to go upstream. How fast does the boat go downstream
*June 1, 2008 by Kim*

**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*

**Math Word Problem**

Steve's boat will go 14 miles per hour in still water. If he can go 13 miles downstream in the same amount of time as it takes to go 10 miles upstream, then what is the speed of the current? (Please round your answer to one decimal place.)
*July 24, 2012 by Lisa L*

**math**

what kind of question is this? Rowing 5 times the speed of current, jacob's team can travel 24 km downstream and at the sametime 16 km upstream. What is jacob's team rate and the rate of the water?
*September 9, 2007 by ryan*

**UnKnown**

Traveling upstream on the Mississippi River, a barge travels 56 mi in 7h. Downstream, it travels the same distance in 4h. Find the rate of the barge in still water and the rate of the current.
*August 17, 2008 by Taylor*

**algebra**

the current in a stream moves at a speed of 2 mph. A boat travels 8mi upstream and 8mi downstream in a total time of 7 hr. What is the speed of the boat in still water
*March 22, 2011 by Anonymous*

**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*

**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*

**math**

it took 3 hours for patrol boat to travel 48km upstream and 2 hours to travel downstream. What is the current and boat speed.
*October 2, 2010 by alex*

**algebra**

The time it takes you to go 12 miles upstream is 5/4 the time it takes you to go 14 miles downstream. If the current is 3mph, how fast do you go in still water.
*February 25, 2012 by Devin*

**algebra**

In a canoe race, a team paddles downstream 480 m. in 60 s. The same team travels up stream in 80 s. Find the team's rate in still water and the rate of the current. Please show how the equation is set up to solve
*May 26, 2012 by chris*

**Math**

Toni rows a boat 4.5 km/h upstream and then turns around and rows 5.5 km/h back downstream to her starting point. If her total rowing time is 48 min, for how long does she row upstream? you can express your answer to the nearest minute. I don't understand how you solve it.
*January 17, 2009 by Angie*

**Algebra**

Cody’s motorboat took 3 hr to make a trip downstream with a 6-mph current. The return trip against the same current took 5 hr. Find the speed of the boat in still water
*February 22, 2011 by Joel*

**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*

**math 116**

A Coast-Guard patrol boat travels 4 hr on a trip downstream with a 6-mph current. The return trip against the same current takes 5 hr. Find the speed of the boat in still water
*March 3, 2009 by Meshelle*

**Algebra**

A boy can row a boat at a constant rate of 5 mi/hr in still water. He rows upstream for 19 minutes and then rows downstream, returning to his starting point in another 13 minutes. What is the rate of the current? What is the total distance traveled?
*September 12, 2011 by Kaley*

**physics**

Hey thanks for the help: I have another question: A swimmer is capable of swimming 0.30 m/s in still water. (a) If she aims her body directly across a 75 m-wide river whose current is 0.55 m/s, how far downstream (from a point opposite her starting point) will she land? (b) ...
*October 6, 2008 by H.Pales*

**projectile motion**

You have a boat with a motor that propels it at vboat = 4.5 m/s relative to the water. You point it directly across the river and find that when you reach the other side, you have traveled a total distance of 27 m (indicated by the dotted line in the diagram) and wound up 14 m...
*November 14, 2010 by leila*

**algebra/ word problem**

Justin paddles his kayak 6 miles upstream in 1,5 hours. he turns around and paddles downstream, the same distance, in only 1 hour. What is the rate in still water and what is the rate of the water's current
*January 9, 2013 by lulu*

**algebra**

how do I solve this and show the work: a motorboat went upstream at 15 miles per hour and returned downstream at 20 miles per hour. How far did the boat travel one way if the round trip took 3.5 hours?
*May 29, 2013 by jessica*

**math**

a man can row a bangka at a rate of 5 km/h in still water. It takes 10 minutes longer to row upstream a distance of 2km than he takes to row downstream. What is the rate of the current?
*November 25, 2013 by alice*

**Math**

A boat travels 45 miles upstream in 5h. The boat travels the same distance downstream in 3hr. What is the rate of the boat in still water? What is the rate of the current? (thank you)
*March 15, 2012 by Analica*

**science**

I have to design a sustainable city with a river running through it. Would I put both my water treatment plant and seweage plant on the river. Water up and sewer plant downstream?
*November 12, 2007 by mike*

**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**

Diane rows a boat at 8.3 m/s directly across a river that flows at 5.6 m/s. (a) What is the resultant speed of the boat? m/s (b) If the stream is 250 m wide, how long will it take Diane to row across? s (c) How far downstream will Diane be
*October 4, 2011 by Eddie*

**physics**

your boat departs from the bank of a river that has a swift current parallel to its banks. if you want to cross the river in the shortest amount of time, you should direct your boat a.) perpendicular to the current b.) upstream c.) downstream d.) so that it drifts with the ...
*March 8, 2008 by stu*

**Physics I**

A person is attempting to swim directly across a river. They are able to swim at a speed of 0.500 m/s relative to the water. The river is 25.0 m wide and the person ends up 50.0 m downstream from their starting point. How fast is the current in the river?
*September 14, 2010 by Dazed and Confused*

**physics**

A Nile cruise ship takes 21.7 h to go upstream from Luxor to Aswan, a distance of 208 km, and 19.4 h to make the return trip downstream. Assuming the ship's speed relative to the water is the same in both cases, calculate the speed of the current in the Nile.
*October 4, 2007 by stephanie*

**Algebra**

A boat can travel upstream 14 miles in same it can travel downstream 8 miles. the boat is traveling 13 miles per hour. what is the current
*June 1, 2008 by Kim*

**physics**

Kym is in a boat traveling 3.8 m/s straight across a river 240 m wide. The river is flowing at 1.6 m/s. a) What is Kym’s resultant velocity? - b) How long does it take Kym to cross the river? - c) How far is Kym downstream when she reaches the other side? -
*November 11, 2009 by sarah*

**Math**

Julie and Eric row their boat (at a constant speed) 21 miles downstream for 3 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 7 hours. Find the rate of the current.
*October 26, 2011 by Hollana*

**physics**

A fisherman sets out upstream from Metaline Falls on the Pend Oreille River in northwestern Washington State. His small boat, powered by an outboard motor, travels at a constant speed v in still water. The water flows at a lower constant speed vw. He has traveled upstream for ...
*February 16, 2011 by Anonymous*

**physics**

A fisherman sets out upstream from Metaline Falls on the Pend Oreille River in northwestern Washington State. His small boat, powered by an outboard motor, travels at a constant speed v in still water. The water flows at a lower constant speed vw. He has traveled upstream for ...
*February 18, 2011 by Anonymous*

**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*

**math**

A boat cruises downstream for 2 hours before heading back. It takes 3.5 hours going upstream to get back. If the speed of the stream is 8 mph, what is the speed of the boat in still water?:
*September 22, 2007 by --*

**MAT 116**

A tugboat goes 180 miles upstream in 10 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current.
*November 11, 2012 by Samantha*

**algebra**

a tugboat goes 160 miles upstream in 20 hours. The return trip downstream takes 10 hours. Find the speed of the tugboat without a current and the speed of the current.
*June 10, 2012 by Math Girl*

**math**

A tugboat goes upstream 120 miles in 20 hours. The return trip downstream takes 10 hours. Find the speed of the tugboat without the current and the speed of the current.
*August 1, 2012 by Lori*

**algebra**

A tugboat goes 180 miles upstream in 15 hours. The return trip downstream takes 10 hours. find the speed of the tugboat without a current and the speed of the current
*August 9, 2012 by maggie*

**alegbra**

a tugboat goes 160 miles upstream in 20 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current.
*August 19, 2012 by ashley*

**Algebra**

A tugboat goes 160 miles up stream in 20 hours, return trip downstream takes 5 hours. Find speed of tugboat without the current and the speed of the current
*March 6, 2013 by Ruth*

**Algebra**

How do you work this out? Going downstream a tugboat averages 17 kph. Coming back upstream its average speed is only 6 kph. How fast does the current flow? How fast is the tugboat going?
*May 26, 2009 by Jillian*

**algebra**

A canoeist can paddle 12 km upstream and 12 km back downstream in the same amount of time as she can paddle 25 km in still water. If the rate of the current is 2 km/hour, what is her rate in still water?
*September 25, 2012 by mike*

**Algebra**

15. A boat travels 30 miles upstream in 4 hours. The trip downstream takes 2.5 hours. Find the rate of the boat in still water. 33. Solve the following: (q + 2)^2 = 25 34. Solve the following: y^2 + 6y + 9 =49 39. How many real roots are there for the equation x^2 + 3x -1? ...
*June 13, 2010 by mysterychicken*

**physics**

How far downstream will a boat aimed 9 degrees upstream land? boat speed= 25m/s river speed= 20m/s river width= 20m/s
*November 14, 2010 by hi*

**Physics**

A kayak is moving across a stream that is flowing downstream at a velocity of 4 km/hour. The kayak's velocity is 3 km/hour. What is the magnitude of the kayak's velocity relative to the river bank?
*September 18, 2011 by Judy*

**math (speed)**

A boat cruises downstream for 2 hours before heading back. It takes 3.5 hours going upstream to get back. If the speed of the stream is 8 mph, what is the speed of the boat in still water?:
*September 22, 2007 by --*

**Math**

A boat moves 7 kilometers upstream in the same amount of time it moves 17 kilometers downstream. If the rate of the current is 9 kilometers per hour, find the rate of the boat in still water.
*May 4, 2011 by Andrew*

**Physics**

A swimmer, capable of swimming at a speed of 0.8 m/s in still water (i.e., the swimmer can swim with a speed of 0.8 m/s relative to the water), starts to swim directly across a 2.5 km wide river. However, the current is 0.91 m/s, and it carries the swimmer downstream.
*September 25, 2012 by Bill*

**physics**

A swimmer heads directly across a river, swimming at 1.72 m/s relative to the water. She arrives at a point 39.0 m downstream from the point directly across the river, which is 72.7 m wide. What is the speed of the river current?
*February 9, 2013 by Anonymous*

**Algebra**

A boat's crew rowed 7.5 downstream,with the current, in 1.5 hours. The return trip upstream against the current,covered the same distance,but took 2.5 hours. Find the crew's rate in still water and the rate of the current.
*March 27, 2012 by Anna*

**Physics**

A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far downstream or upstream ...
*October 18, 2009 by joshua*

**Physics**

A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far downstream or upstream ...
*October 18, 2009 by joshua*

**Physics**

A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far downstream or upstream ...
*October 19, 2009 by joshua*

**science**

A boat crossing a .2 mile wide river is heading perpendicularly relative to shore. Its speed in still water is 4mph and the speed of the current is 6mp. a.) How far downstream will the boat land? b.) How long will it take for the boat to cross i.) with the current? ii.) ...
*September 29, 2010 by laura*

**Physics**

Jon is attempting to swim straight across a swift flowing river that is 30 meters wide. Jon can swim at 5 m/s relative to the water. The current is moving at 7 m/s and Jon makes no correction for the current. How far downstream does Jon end up by the time he reaches the other ...
*September 23, 2010 by Milo*

**Physics**

A motorboat heads due east at 8.5 m/s across a river that flows to the south at a speed of 2.5 m/s. a. What is the velocity of the boat relative to a stationary observer on the shore? B. If the river is 1360 m wide, how long does it take the boat to cross the river? C. How far...
*January 4, 2011 by Lilah*

**physics**

A swimmer is capable of swimming 0.45 m/s in still water. (a) If she aims her body directly across a 75 m-wide river whose current is 0.30 m/s, how far downstream (from a point opposite her starting point) will she land? (b) How long will it take her to reach the other side? ...
*December 2, 2009 by carol*

**algebra**

A boat's crew rowed 13.5 miles downstream, with the current, in 1.5 hours. The return trip upstream against the current covered the same distance, but took 4.5 hours. Find the crew's rowing rate in still water and the rate of the current.
*December 15, 2010 by tiara*

**Intermediate Algebra**

in still water, a paddle boat averages 10 miles per hour. It takes the boat the same amount of time to travel 36 mile downstream, with the current as 24 miles upstream, against the current. What is the rate of the water's current?
*December 9, 2012 by Anonymous*

**Algerbra**

A boat's crew rowed 10.5 miles downstream, with the current, in 1.5 hours. The return trip upstream, against the current, covered the same distance, but took 3.5 hours. Find the crew's rowing rate in still water, and the rate of the current.
*April 10, 2013 by Ali*

**physics**

A boat travels at 3.8 m/s and heads straight across a river 240 m wide. The river flows at 1.6 m/s. Find A) The boat's resultant velocity. B) How long it takes the boat to cross the river. C) How far downstream the boat is when it reaches the other side. Please help, i have ...
*November 2, 2008 by PLEASE HELP!*

**Physics - URGENT**

A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far downstream or upstream ...
*October 19, 2009 by joshua*

**Help...More Math Help!!!...Please!**

A kayaker paddled 2 hours with a 6 mph current in a river. The return trip against the same current took 3 hours. Find the speed the kayaker would make in still water. The speed is 6 mph slower going upstream and 6 mph faster going downstream. Distance traveled = time x speed...
*November 16, 2006 by Jessica*

**math**

A boat traveled 45 miles downstream (w/ the current) in 3 hours and made the return trop (against the current) in 5 hours. What was the speed of the boat and what was the speed of the current?
*April 27, 2011 by mindy*

**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*

**Maths**

In a swimming race, you find that a swimmer can swim downstream (with the current) in a river, 2 miles in 40 minutes, & upstream (against the current) 2 miles in 60 minutes. How long would it take the swimmer to swim a mile in still water?
*February 1, 2013 by Mir Aman*

**calculus**

Amy wants to reach, as quickly as possible, a destination of 5km downstream and on the opposite side of the river that is 1.5km wide. If she can run at 16kmp and can swim at 5kmp, how far should she run down the shore before turning into the water to swim? Consider the river ...
*December 12, 2012 by Jim*

**physics - need help right now.**

A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far downstream or upstream ...
*October 18, 2009 by joshua*

**math**

A swimmer going downstream takes 1hour, 20 minutes to travel a certain distance. If takes the swimmer 4 hours to make to return trip against the current. If the river flows at the rate of 1.5mph. Find the rate of the swimmer in still water and the distance traveled one way.
*July 31, 2010 by joy*

**phy**

A boat can travel 2.60 m/s in still water.If the boat points its prow directly across a stream whose current is 1.10 m/s, what is the velocity (magnitude and direction) of the boat relative to the shore? What will be the position of the boat, relative to its point of origin, ...
*September 5, 2010 by ami*

**Physic**

Water enters a horizontal pipe with a rectangular cross section at a speed of 1.00 m/s. The width of the pipe remains constant but the height decreases. 27.3 m from the entrance, the height is half of what it is at the entrance. If the water pressure at the entrance is 2921 Pa...
*April 18, 2014 by mican*

**physics**

Water enters a horizontal pipe with a rectangular cross section at a speed of 1.00 m/s. The width of the pipe remains constant but the height decreases. 27.3 m from the entrance, the height is half of what it is at the entrance. If the water pressure at the entrance is 2921 Pa...
*April 19, 2014 by suzan*

**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*

**algebra**

A boat can travel 114 miles upstream in the same time that it can travel 186 miles downstream. If the speed of the current is 6 miles per hour, find the speed of the boat without a current.
*August 17, 2011 by carl*

**Physics**

A boat moves through the water of a river at 9.5 m/s relative to the water, regardless of the boats direction. If the water in the river is flowing at 0.9 m/s, how long does it take the boat to make a round trip consisting of a 300-m displacement downstream followed by a 300-m...
*September 16, 2013 by Kelsey*

**Math**

Brian's boat has a top speed of 9 miles per hour in still water. While traveling on a river at top speed, he went 10 miles upstream in the same amount of time he went 20 miles downstream. Find the rate of the river current.
*April 14, 2014 by Andrea*

**physics**

Please help me !!! for solution of this question Water enters a horizontal pipe with a rectangular cross section at a speed of 1.00 m/s. The width of the pipe remains constant but the height decreases. 27.3 m from the entrance, the height is half of what it is at the entrance...
*April 19, 2014 by suzan*

**math**

please help me to solve this problem A swimmer going downstream takes 1hour,20minutes to travel a certain distance. It takes the swimmer 4hours to make the return trip against the current. If the river flows at the rate of 1.5mph. Find the rate of the swimmer in still water ...
*July 31, 2010 by joy*

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