a man speed 4.5 kmph in still water rows upstream and back to strating point river speed 1.5kmph find avg speed
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A man can row at a speed of 12 km/hr in still water to a certain upstream point and back to the starting point in a river which flows at 3 km/hr. Find his average speed for total journey. A. 1234 12 3 4 km/hr.
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