A man wishes to swim across a river 0 5 km wide If he can swim at the rate of 2 km h in still water and the river flows at the

Question

A man wishes to swim across a river 0 5 km wide If he can swim at the rate of 2 km h in still water and the river flows at the rate of 1 km h The angle made by the directon w r t the flow of the river along which he should swim so as to reach a point exactly opposite his starting point should be 1 60 2 120 3 145 4 90

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