Question

A man can swim in still water at 4.5 kmph but takes wice as long to swim upstream than
downstream. The speed of the steam is-
​

Answer 1

Explanation:

Speed of Boy is B = 4.5 kmph

Let the speed of the stream is S = x kmph

Then speed in Down Stream = 4.5 + x

speed in Up Stream = 4.5 - x

As the distance is same,

=> 4.5 + x = (4.5 - x)2

=> 4.5 + x = 9 -2x

3x = 4.5

x = 1.5 kmph

Answer 2

Answer:

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