Question

A motorboat takes 5 hours to travel 150km going upstream. the return trip takes 3 hours going downstream. What is the rate of the boat in still water? and what is the rate of the current?

Answer #1

let speed of boat = x

speed of current = y

upstream : 5(x - y) = 150

downstream : 3 ( x+y ) = 150

5x - 5y = 150

3x + 3y = 150

so, rate of boat = 40 kmph

rate of current = 10 kmph

A boat takes 3 hours to go 6 miles upstream. It can go 18 miles
downstream in the same time. Find the rate of the current and the
rate of the boat in still water.? (Hint: Because the current pushes
the boat when it is going? downstream, the rate of the boat
downstream is the sum of the rate of the boat and the rate of the
current. The current slows down the boat when it is going?
upstream, so...

A boat takes 4 hours to go 8 miles upstream. It can go 32 miles
downstream in the same time. Find the rate of the current and the
rate of the boat in still water. (Hint: Because the current pushes
the boat when it is going downstream, the rate of the boat
downstream is the sum of the rate of the boat and the rate of the
current. The current slows down the boat when it is going
upstream, so...

A boat travels 500 km in eight hours going upstream and 430 km
in five hours going downstream. Find the speed of the boat in still
water, and find the speed of the current.

A motorboat travels 30 min upstream against a 4-mph current.
Returning with current takes 18 min. Find the speed of the
motorboat in still water ( watch out the units in motion,One is 30
min but current is mile per hour (mph))

A motorboat is capable of traveling at a speed of 10
miles per hour in still water. On a particular day, it took
10
minutes longer to travel a distance of 44
miles upstream than it took to travel the same distance
downstream. What was the rate of current in the stream on that
day?

A small, battery-powered, electric motorboat that can travel at
a speed of 2.05 m/s in still water is operating in a river with a
flow speed of 1.25 m/s. For each of the following two cases,
determine the requested information for a river that is 244 m
wide.
(a) Case 1: when the boat is pointed straight across the river,
determine the speed vbl of the boat
as viewed by someone on land, the distance d the boat is
swept downstream...

A boat
takes 3.9 hours to travel 25 km down a river, then 6.9 hours to
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You may want to review (Pages 876 - 878) .
Part A
Determine the speed of the water in the river.

The
current of a river is 3 miles per hour. A boat travels to a point
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boat in still water ? The speed of the boat in still water is
?

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the rate Ina can row in still water and let y represent the rate of
the current.
d equals= r times • t
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Upstream. x minus?y
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A boat is able to move over still water at 19 m/s. If the boat
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required to complete the round trip.
The time of the round trip with the river current, t1
=
If the water is still (meaning there is no current) then the
time of the round trip...

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