Question
A man can row 8 km/hr in still water. If the speed of
the current is 2 km/hr, it takes 3 hours more in upstream than in the downstream for the same distance. The distance isSolution
Let the required distance be x km. Therefore, x/(8 – 2) – x/(8 + 2) = 3 ⇒ x/6 – x/10 = 3 ⇒ (5x – 3x)/30 = 3 ⇒ x = 3 x 30/2 = 45 km
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