Question

A man can row a certain distance downstream in 1.5 hours

Let the speed of the man in still water be x kmph. Then, x 3 1.5 x - 3 2.5 1.5x 4.5 2.5x - 7.5 x 12 kmph.

and return in 2.5 hours. If the rate of stream is 3 kmph, then what is the speed of the man in still water?

A 9 kmph

B 12 kmph

C 15 kmph

D 18 kmph

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