Saturday

April 19, 2014

April 19, 2014

Number of results: 425

**Math**

How long does it take the boat to cross the river of 80 m. wide at 4 m/s? During this time, how far would the boat be carried downstream at 3 m/s?
*Saturday, September 12, 2009 at 5:26pm by MathMate*

**word problem**

A cruise boat travels 96 miles downstream in 3 hours and returns upstream in 6 hours. Find the rate of the stream.
*Thursday, June 22, 2006 at 9:11pm by Anonymous*

**maths**

A motor boat goes downstream twice as fast as upstream. Find the power speed of the boat if the water flows at 6km/h.
*Monday, December 24, 2012 at 1:40pm by Anonymous*

**physics**

A swimmer can swim in still water at a speed of 9.42 m/s. He intends to swim directly across a river that has a downstream current of 3.04 m/s.
*Sunday, September 22, 2013 at 12:29pm by Anonymous*

**college math**

boat travels 160 miles downstream in the same time that it takes to go 96 upstream. the pead of the stream is 6 mph. what is the speed of still water
*Friday, March 9, 2012 at 4:57pm by victor*

**how do i set up this problem?**

A cruise boat travels 48 miles downstream in 3 hours and returns upstream in 6 hours. Find the rate of the stream
*Sunday, March 8, 2009 at 9:40pm by Angela G*

**math**

Solve the problem. A cruise boat travels 48 miles downstream in 3 hours and returns upstream in 6 hours. Find the rate of the stream.
*Friday, March 20, 2009 at 6:44pm by anthony*

**Math**

Sam rows up a river to camp in 3 hours. The next day he makes the return trip downstream in 1 hour. If he can row 2 mph in still water, how fast is the current?
*Thursday, December 2, 2010 at 7:28pm by Sherkyra8456*

**Physics**

how much time does it take to swim across? time=distancewide/speed How far downstream? distance=currentspeed*time
*Thursday, September 23, 2010 at 7:26pm by bobpursley*

**physics**

You can paddle at 4.5 km/h and the river is ﬂowing at 3 km/h. How far downstream will you be in 44 min? Answer in units of km
*Sunday, May 12, 2013 at 8:12pm by matt *

**math 116**

The downstream speed with respect to land is V+6 and the upstream speed is V-6, where V is the speed in still water. Let the distance be D D/(V+6) = 4 hrs D/(V-6) = 5 4(V+6) = 5(V-6) V = 54 mph
*Tuesday, March 3, 2009 at 7:56pm by drwls*

**Math**

Victoria has a boat that can move at a speed of 20km/h in still water. She rides 140km downstream in the same time it takes 35km upstream. What is the speed of the river?
*Thursday, May 17, 2012 at 2:57am by Courtney*

**physics**

A swimmer swims in still water at a speed of 6.83 m/s. He intends to swim directly across a river that has a downstream current of 2.89 m/s. (a) What must the swimmer's direction be?
*Thursday, December 13, 2012 at 8:07pm by Anonymous*

**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?
*Wednesday, January 2, 2013 at 6:26pm by Kate*

**algebra**

tana rode a boat 1 km upstream in and hour. rowing at the same rate, she made the return trip downstream in 15 minutes. find the rate of the current
*Friday, April 29, 2011 at 3:17pm by lee*

**math**

A river has a current of 4 mph. Find the speed of Simon’s boat in still water if it goes 40 miles downstream in the same time as 24 miles upstream.
*Monday, July 23, 2012 at 11:15pm by john*

**physics**

a motorboat is heading across a river at 6km/h in a direction making an angle 60 degree to the current. current is moving boat downstream at 3 km/h. what is the resultant velocity?
*Wednesday, September 26, 2012 at 12:36pm by sindy*

**physics**

Traffic shock wave. An abrupt slowdown in concentrated traffic can travel as a pulse, termed a shock wave, along the line of cars, either downstream (in the traffic direction) or upstream, or it can be stationary. Figure 2-22 shows a uniformly spaced line of cars moving at ...
*Monday, October 10, 2011 at 11:30am by turk*

**physics**

Calculate upstream rate = d/t. Calculate downstream rate = d/t. subtract rates to obtain speed of the river.
*Thursday, October 4, 2007 at 12:10pm by DrBob222*

**phy**

velocity relative to shore? it is: Vbshore=Vriver +Vboat where Vriver is 1.1m/s downstream; Vboat is 2.60across.
*Sunday, September 5, 2010 at 1:14pm by bobpursley*

**math**

28 miles downstream in 2 hours 12 miles upstream in 3 hours what would the be speed in still water
*Monday, September 24, 2012 at 11:37pm by kyla*

**Physics**

215/(5-1.3) = 58.1sec. upstream 215/(5+1.3) = 34.1 sec. downstream Round trip time = 92.2 sec.
*Sunday, June 1, 2008 at 2:41pm by tchrwill*

**physics**

How long does it take to swim 75m at.45m/s? Take that time, and find the distance he was swept downstream(.45*time).
*Wednesday, December 2, 2009 at 7:48pm by bobpursley*

**Algebra**

speed of boat in still water ---- x mph distance going upstream = 5(x-6) distance going downstream = 3(x+6) Are the distances not equal ?
*Tuesday, February 22, 2011 at 9:08am by Reiny*

**Math**

Austin is in his pedal boat. It takes him 1.5 hours to travel 12 miles downstream and 6 hours to return. What is the rate of the current? Please show me how to solve it as well, I really have no idea. Thanks.
*Sunday, March 10, 2013 at 10:13pm by Catherine*

**Science**

reduction in water flow downstream might change the fish habitat soil, fertilizer, pesticides get washed into the fishing grounds, maybe affecting both plants and fish there
*Thursday, December 19, 2013 at 11:27pm by Steve*

**physics**

time across= 20/25cos9 distance downstream= 20m/s * time across
*Sunday, November 14, 2010 at 6:09pm by bobpursley*

**physics**

Water is flowing at 6 m/s in a circular pipe. If the diameter of the pipe decreases to five-seventh its former value, what is the velocity of the water downstream?
*Monday, November 8, 2010 at 10:32pm by David*

**Texas History**

If a legislator supported a measure letting factories be built on a river in her home district but then reversed his decision when he worried about pollution being sent downstream, which model of representation would he be following?
*Sunday, August 29, 2010 at 8:23pm by Hector*

**physics**

A swimmer is capable of swimming at 1.4m/s in still water. Calculate the following. i. How far downstream will he land if he swims directly across 180m wide river? ii. How long will it take him to the other side.
*Monday, February 11, 2013 at 5:52pm by Ashman*

**Physics I**

The person swims at 0.5m/s. If the current takes him 50m downstream in the same time it took him to swim 25m across (with or without current), what would be the speed of the current?
*Tuesday, September 14, 2010 at 10:57pm by MathMate*

**Intermediate Algebra Word Problem**

Yes, it is correct. The upstream speed relative to land (8 mph) is half the downstream speed (16 mph), as required.
*Wednesday, February 11, 2009 at 8:57am by drwls*

**physics**

The current of a river is 1.9 m/s. A person can swim 0.7 m/s. What is the best angle for the swimmer so that it is swept downstream the shortest distance possible? Distance of river is 120 m.
*Monday, February 22, 2010 at 12:37am by matthew*

**Physics 11**

A river has a current of 5 m/s. A boat tries to head directly across at 4 m/s. When the boat reaches the other side it is 30m downstream. How wide is the river ?
*Monday, October 18, 2010 at 5:50pm by Denny *

**physics 11**

A river has a current of 5 m/s. A boat tries to head directly across at 4 m/s. When the boat reaches the other side it is 30m downstream. How wide is the river ?
*Tuesday, October 19, 2010 at 6:35pm by joshua*

**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.
*Wednesday, July 27, 2011 at 1:38pm by Antione*

**physics**

the cross-stream speed is 4.7 cos 24.4° = 4.29m/s So, it takes 25.9/4.29 = 6.04 sec The speed of the river does not matter, unless you want to find how far upstream or downstream the boat lands.
*Monday, September 10, 2012 at 11:25pm by Steve*

**physics**

Does it matter which portion of the opposite shore he arrives at? It makes a difference. Aiming across the shore while drifting downstream is the quickest way to cross, and takes 2.0/12.3 = 0.1626 h = 9.76 minutes
*Monday, December 17, 2012 at 9:10pm by drwls*

**physics**

Water is flowing at 3 m/s in a circular pipe. If the diameter of the pipe decreases to four-ninth its former value, what is the velocity of the water downstream? Answer in units of m/s.
*Wednesday, November 5, 2008 at 1:26pm by Lines in the Sand122*

**college math**

v = boat speed speed downstream = (v + 6) speed upstream = (v-6) time = distance/speed 160/(v+6) = 96/(v-6) 10/(v+6) = 6/(v-6) 5/(v+6) = 3/(v-6) 3(v+6) = 5(v-6) 3 v + 18 = 5 v - 30 2 v = 48 v = 24 mph
*Friday, March 9, 2012 at 4:57pm by Damon*

**Science**

A boat is sailing 42 km/hr upstream on a river that is moving at 16 km/hr downstream. What is the velocity of the sailboat.....can you show me the formula too...not understanding this
*Wednesday, November 28, 2012 at 12:50am by Joy*

**algebra1 **

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? i dont understand this?
*Friday, January 18, 2013 at 10:35am by naomi*

**maths**

a steamer goes downstream in a river and covers the distance between upstream in 6 hours if the speed of the stream is 3 km/hr. firnd the speed of the steamer in still water.
*Tuesday, May 24, 2011 at 4:35am by Abhishek*

**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?
*Saturday, April 21, 2012 at 5:02pm by mel*

**Math 111**

It takes a motorboat 1 1/3 hours to go 20 miles downstream and 2 2/9 hours to return.Find the rate of the current andthe rate of the boat in still water.
*Saturday, December 14, 2013 at 8:46pm by Jeriah*

**Physics**

I don't quite understand the grammar of your question. The downstream average velocity of the wind is reduced by the presence of windmmills, if that it what you mean. That is becasue the air must lose kinetic energy to produce useful electrical energy.
*Sunday, November 18, 2007 at 12:38am by drwls*

**Science-- Physics**

Equilibrium is when no part of the body is accelerating. Constant speed is ok. It just means that all forces and moments are balanced so there is no net force and acceleration is zero. If you are drifting downstream on a river, you are probably in equilibrium :)
*Thursday, January 10, 2008 at 7:31pm by Damon*

**algebra**

A boat on a river travels downstream between two points, 70 mi apart, in one hour. The return trip against the current takes 2 1 2 hours. What is the boat's speed (in still water)
*Friday, November 9, 2012 at 7:11pm by Anonymous*

**physics**

The time it will take to cross the river while aimed straight across will be 150 m/0.95 m/s = 157.9 s During that time, she will drift 157.9 * 0.65 = 102.6 meters downstream
*Thursday, September 20, 2012 at 2:57am by drwls*

**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.
*Sunday, December 2, 2012 at 8:21am by Wanda*

**Math**

if boat speed = b, and river speed = r, then since speed = distance/time, b+r = 12/1.5 = 8 (downstream) b-r = 12/6 = 2 (upstream) b=5,r=3
*Sunday, March 10, 2013 at 10:13pm by Steve*

**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).
*Monday, December 13, 2010 at 8:17pm by Sherkyra8645*

**math**

Set-up: Let v=speed of boat c=speed of current Distance = speed*time Upstream: 120=(v-c)*20 ...(1) Downstream: 120=(v+c)*10 ...(2) Solve for v and c.
*Wednesday, August 1, 2012 at 6:32pm by MathMate*

**swim**

A swimmer is capable of swimming 1.00 m/s in still water. If she aims her body directly across a 150-m-wide river whose current is 0.80 m/s, how far downstream (from a point opposite her starting point) will she land?
*Tuesday, January 26, 2010 at 8:11pm by Anonymous*

**physics**

A swimmer is capable of swimming 0.95 m/s in still water. (a) If she aims her body directly across a 150-m-wide river whose current is 0.65 m/s, how far downstream (from a point opposite her starting point) will she land?
*Thursday, September 20, 2012 at 2:57am by jeje*

**physics**

at 1.1m/s, she takes 72/1.1 = 65.45 seconds to cross In that time she travels downstream 52m, so the current is 52m/65.45s = .794m/s with that, you should be able to get the angle needed.
*Tuesday, September 11, 2012 at 3:19pm by Steve*

**Trig**

Downstream, he is going with current, 2mph. Crosswise, he is going 1.8mph. Draw the diagram. I see TanTheta=1.8/2.0 His actual speed? speed=sqrt(2^2+1.8^2) or speed=2.0/sinTheta
*Monday, May 10, 2010 at 12:54pm by bobpursley*

**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?
*Tuesday, January 14, 2014 at 6:18pm by Urgent*

**Math**

speed of boat in still water --- x mph time upstream = 10/(x-1) time downstream = 10/(x+1) isn't the total time 16/3 hours ? I am sure you can take it from here.
*Thursday, October 28, 2010 at 10:16pm by Reiny*

**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?
*Wednesday, March 6, 2013 at 9:48pm by sofia*

**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
*Wednesday, October 16, 2013 at 8:23pm by Carlos*

**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
*Thursday, April 3, 2014 at 10:49am by Amy*

**algebra**

the upstream and downstream speeds differ by twice the current speed, or 2 m/s. so, still-water speed is 2.5 m/s up = s+r down = s-r s = (up+down)/2 = (1.5+3.5)/2 = 2.5
*Wednesday, November 7, 2012 at 12:17pm by Steve*

**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?
*Sunday, February 2, 2014 at 4:16pm by judy*

**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.
*Saturday, October 2, 2010 at 7:51pm by alex*

**Math**

Their speed downstream = 21/3 = 7mph Their speed upstream = 21/7 = 3mph So, the river speed is (7-3)/2 = 2mph Their rowing speed is 5mph.
*Wednesday, October 26, 2011 at 9:52pm by Steve*

**motion problem**

since time = distance/speed, if his speed is s, then 30/(s-2) = 2 + 30/(s+2) s = 8 check: downstream: 30/10 = 3 upstream: 30/6 = 5
*Tuesday, November 12, 2013 at 8:37pm by Steve*

**math help please**

Solve the problem. A boat can go 33 mph in still water. It takes as long to go 300 miles upstream as it does to go downstream 360 miles. How fast is the current?
*Friday, March 20, 2009 at 5:54pm by anthony*

**ALGEBRA**

Jim paddles a canoe upstream at a rate o 3mi/hr. Traveling downstream, he travels at 8 mi/hr. What is his rate in still water and what is the rate of the current? PLEASE SHOW THE SOLUTION EQUATION
*Saturday, May 26, 2012 at 11:23pm by chris*

**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
*Saturday, March 6, 2010 at 7:38am by kaur*

**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
*Tuesday, March 22, 2011 at 1:04pm by Anonymous*

**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?
*Saturday, June 22, 2013 at 5:05am 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?
*Saturday, June 22, 2013 at 5:05am 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?
*Saturday, June 22, 2013 at 5:13am by raja harishchandra*

**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 ...
*Wednesday, September 22, 2010 at 10:27pm by kim*

**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?
*Sunday, July 22, 2012 at 11:20pm by john*

**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?
*Sunday, October 6, 2013 at 5:33pm by Ernie*

**Lang. Arts PLZ HELP!!D:**

Well, the white water is on the downstream side.. sometimes. I would rather canoe in the reservoir behind the dam. I would be more concerned about how the dam affects fish that come upstream to spawn in that river
*Thursday, February 26, 2009 at 5:46pm by drwls*

**Math**

JJ's boat will go 15 mph in still water. If he can go 12 mph downstream in the same amount of time it takes to go 9 mph upstream, what is the speed of the current?
*Sunday, March 25, 2012 at 2:19pm by Sarah *

**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 ...
*Monday, September 20, 2010 at 7:20pm by Kelly*

**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?
*Thursday, February 24, 2011 at 5:50pm by Kevinn*

**Physics**

I suppose you have done vectors to do this exercise. Basically, you'd need to represent each velocity in magnitude and direction, and proceed to add them up verctorially to get the resultant. For the first part, to swim across in minimum time, I would aim right across the ...
*Thursday, October 15, 2009 at 11:12am by MathMate*

**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.
*Sunday, August 17, 2008 at 4:40pm by Taylor*

**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.
*Saturday, February 1, 2014 at 7:46pm by russ*

**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?
*Wednesday, November 3, 2010 at 10:05pm by Dusty*

**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
*Wednesday, January 9, 2013 at 9:18pm by lulu*

**math**

A canoe can travel 18 mph in still water and 22 miles downstream in the same amount of time that it takes to travel 14 mph upstream. Find the speed of the current in the water.
*Tuesday, August 2, 2011 at 8:51pm by kayla garner*

**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? ►
*Friday, January 28, 2011 at 3:38pm by john*

**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
*Sunday, June 1, 2008 at 10:10am by Kim*

**college algebra**

Distance = rate * time Let x = speed of current rate upstream = 34 - x rate downstream = 34 + x 21(34 - x) = 13(34 + x) Solve for x.
*Wednesday, June 9, 2010 at 3:35pm by PsyDAG*

**math**

The speed of a boat in still water is 8 km/h. It travels 60 km upstream and 60 km downstream in a total time of 16 hours. What is the speed of the stream?
*Tuesday, March 23, 2010 at 5:06pm by Tonto*

**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)
*Thursday, March 15, 2012 at 9:46pm by Analica*

**Grammar and Composition**

yes, close, but try to take "I" out of the picture, and place the reader in. As.. My feet felt numb because.....Sitting on the bank, my worries were washed away with the river moving downstream. You want the reader to feel it. That is what I mean by showing, and getting away ...
*Thursday, October 22, 2009 at 2:52pm by bobpursley*

**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? This is what I did ...
*Thursday, September 23, 2010 at 5:15pm by Nicole*

**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?
*Monday, November 25, 2013 at 9:49am by alice*

**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?
*Monday, November 12, 2007 at 10:29am by mike*

**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?
*Wednesday, October 27, 2010 at 6:05pm by Dave*

**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
*Tuesday, October 4, 2011 at 9:21pm by Eddie*

**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?
*Tuesday, December 4, 2012 at 9:35pm by Alex*

**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 ...
*Saturday, March 8, 2008 at 5:03pm by stu*

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