A swimmer wishes to cross a river 500 m wide flowing at a rate u. His speed with respect to still water is V. For this, he makes an angle θ with the vertical to the direction of flow of the river as shown. In order to cross the river in minimum time, the value θ of in degrees should be

A swimmer wishes to cross a river 500 m wide flowing at a rate u. His

1.	A swimmer wishes to cross a river 500 m wide flowing at a rate u. His speed with respect to still water is V. For this, he makes an angle θ with the vertical to the direction of flow of the river as shown. In order to cross the river in minimum time, the value θ of in degrees should be
Answer» A swimmer wishes to cross a river $500 m$ wide flowing at a rate $u$ . His speed with respect to still water is $V$ . For this, he makes an angle $θ$ with the vertical to the direction of flow of the river as shown. In order to cross the river in minimum time, the value $θ$ of in degrees should be

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A swimmer wishes to cross a river 500 m wide flowing at a rate u. His speed with respect to still water is V. For this, he makes an angle θ with the vertical to the direction of flow of the river as shown. In order to cross the river in minimum time, the value θ of in degrees should be

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