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A man can row 3/5 the of a kilometer upstream in 10 minutes and return in 6 minutes. Find the speed of man in still water.

A.	1.6 km/hr	B.	4.8 km/hr
C.	9.6 km/hr	D.	5.4 km/hr

Answer and Explanation

Answer:4.8 km/hr

Explanation:
Upstream speed = 3/5 / 10/60 = 3/5 Ã— 60/10 = 3.6 km/hr
Downstream speed = 3/5 Ã— 60/6 = 6 km / hr
Speed in still water = 6 + 3.6 / 2 = 9.6 / 2 = 4.8 km/hr

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