A man rows a boat at a speed of 5 km/hr in still water. Find the speed of a rive

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โœช Choose the correct option.

A man rows a boat at a speed of 5 km/hr in still water. Find the speed of a river if it takes him 1 hr to row a boat to a place 2.4 km away and return back.

A. 1 km/hr
B. 6 km/hr
C. 3 km/hr
D. 4 km/hr

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