A man can row three quarters of a kilometer against the stream in 45/4 minutes,the speed of the man in km/hr is
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SolutionSpeed upstream = 3/4 * 2/15 * 60 km/hr = 4 km/hr
Speed downstream = 3/4 * 2/15 * 60 km/hr = 6 km/hr
Therefore
Speed in still water = 1/2 (4+6) km/hr = 5 km/hr
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