1. A man swimming in a river which is flowing at 3(1/2) km/hr finds that in a given time he can swim twice as far downstream as he can swim upstream. What will be his speed in still water?
A man swimming in a river which is flowing at 3(1/2) km/hr finds that in a given time he can swim twice as far downstream as he can swim upstream. What will be his speed in still water?
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