Question

A boat travels from p to q alone the current and from q to p against the current in 3 hours. If the speed of the boat in still water is 4 kmhr then, what is the distance between p and ?

Answer 1

Explanation:

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Answer 2

Answer:

Let X be the speed of boat then

upstream speed of boat is (x-1)kph

downstream speed of boat is (x+1)kph

by condition,

4/(x-1)+4/(x+1)=3

4x+4+4x-4=3 (x×x-1)

8x=3x×x-3

=>x=3kph (using splitting middle term )

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