Question

The speed of a boat in still water is 15 km/h , and

Upstream speed 15 3 12 kmh Downstream speed 15 3 18 kmh Time upstream 36 12 3 hours Time downstream 54 18 3 hours Total time 3 3 6 hours

the speed of the stream is 3 km/h . How much time will it take to travel 36 km upstream and 54 km downstream ?

A 1 hrs

B 3 hrs

C 6 hrs

D 9 hrs

E None of these

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