Question
A man can row 12 km/hr in still water. If the speed of
the current is 3 km/hr, it takes 4 hours more in upstream than in the downstream for the same distance. The distance isSolution
Let the required distance be x km. According to the question ⇒ x/(12 – 3) – x/(12 + 3) = 4 ⇒ x/9 – x/15 = 4 ⇒ (5x – 3x)/45 = 4 ⇒ x = 4 x 45/2 = 90 km
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