Question
A man can row 25/2 km an hour in still water and he
finds that it takes him thrice as long as long to row down the river. The rate of stream is:Solution
Let the rate of stream be x km/hr Then, Speed of downstream = [(25/2) + x] km/hr Speed of upstream = [(25/2) - x] km/hr [(25/2) + x] = 3 [(25/2) - x] (25/2) + x = (75/2) - x 4x = 25 x = 6.25 km/hr
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