A swimmer wants to cross a river from point $A$ to point $B$ . Line AB makes an angle of $30 °$ with the flow of the river. The magnitude of the velocity of the swimmer is the same as that of the river. The angle $\theta$ with the line $AB$ should be _______ $°$ , so that the swimmer reaches point $B$ .

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A swimmer wants to cross a river from point A to point B . Line AB makes an angle of 30 ° with the flow of the river.

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Both velocity vectors are of same magnitude therefore resultant would pass exactly midway through them θ = 30 °

A swimmer wants to cross a river from point A to point B . Line AB...

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