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A man can swim at the rate of 5 km/h in ...

A man can swim at the rate of 5 km/h in still water. A river 1 km wide flows at the rate of 3 km/h. The man wishes to swim across the river directly opposite to the starting point. A. Along what direction must the man swim? B. What should be his resultant ? C. How much time he would take to cross?

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The correct Answer is:
a. 1270; b. 4km/hr; c. 15 min
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