Asked by daniela

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?
Answered by Steve
since time = distance/speed,

40/(15+s) = 25/(15-s)

Now just find s, the stream's speed.
Answered by daniela
thank you
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