Question
A man can row at 3 kmph in still water. If the velocity
of current is 2 kmph and it takes him 6 hour to row to a place and come back, how far is the place?Solution
Let the distance be x km. Speed upstream = 3 – 2 = 1 kmph Speed downstream = 3 + 2 = 5 kmph => (x/5) + (x/1) = 6 => (x + 5x)/5 = 6 => 6x = 30 => x = 5 km
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