Question 188 of 308

A swimmer wants to cross a river from point $A$ to point $B$. Line AB makes an angle of $30^{\circ}$ 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 _______$^{\circ}$, so that the swimmer reaches point $B$.

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Answer: 30

Both velocity vectors are of same magnitude therefore resultant would pass exactly midway through them $\theta =30^{\circ}$