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A man can swim with a speed of 4.0 km/h in still water. How long does he take to cross a river 1.0 km wide if the river flows steadily at 3.0 km/h and he makes his strokes normal to the river current? How far down the river does he go when he reaches the other bank?

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eginarrayl 	ext  Answer: Speed of  operatornameman v _ m =4 km / h\ 	ext  So, time taken to cross  1 km =1 / 4 hr =15 min\ 	ext  Distance covered with flow of river =3 	imes 1 / 4 hr =750 m endarray

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Deependra Verma

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