A man can row 6 kmph in still water. When the river is running at 1.2 kmph, it takes him 10 hours to row to a place and back. How far is the place?
Explanation:
Man's speed = 6 km/hr
River’s speed = 1.2 km/hr
Speed while going downstream = (b + r) = (6 + 1.2) = 7.2
Speed while going upstream = (b - r) = (6 - 1.2) = 4.8
(x/7.2) + (x/4.8) = 10
x = 28.8
Hence, option (b).
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