A boatman can row 3 km/h in still water. He takes thrice as much time to row upstream as to row downstream for the same distance. Find speed of water.

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A boatman can row 3 km/h in still water. He takes thrice as much time to row upstream as to row downstream for the same distance. Find speed of water.

A2 kmph

B1 kmph

C2.5 kmph

D1.5 kmph

Answer:

D. 1.5 kmph

Read Explanation:

Let the speed of water = S Distance Covered Downstream = Distance Covered Upstream (3+S)×T = (3−S)×3T 3 + S = 9 − 3S S = 6/4 = 1.5 kmph

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