A man can row 6 km h in still water If the speed of the current is 2 km h it takes 3 hrs more in ups...........

Quant (SSC) Boats and Streams

A man can row 6 km/h in still water. If the speed of the current is 2 km/h, it takes 3 hrs more in upstream than in the downstream for the same distance. The distance is

30 km

24 km

20 km

32 km

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Explanation:

Let the required distance be x km.
As per the question, Time_upstream – Time_downstream = 3
⇒ Distance /Speed_upstream- Distance /Speed_downstream = 3
∴ (x /6 - 2) - (x /6 + 2) = 3
⇒ x /4 - x /8 = 3
⇒ 2x – x /8 = 3
⇒ x = 3 × 8 = 24 km.