Question

Speed of boat in still water is 9km/hour. If boat moves upstream a to b in 2 hours & b to a in 1 hours, then find the distance between a & b?

Answer 1

Answer:

ans:12km

Let speed of stream = s kmph

distance be x

for upstream

(9-s)*2=x (speed*time=distance)

for downstream

(9+s)*1=x

On solving we get x=12km

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