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A boat crossing a river moves with a velocity $v$ relative to still water. The river is flowing with a velocity $v / 2$ with respect to the bank. The angle with respect to the flow direction with which the boat should move to minimize the drift is-
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Verified Answer
The correct answer is:
$120^{\circ}$
To minimize the drifting
$\begin{array}{l}
\sin \theta=\frac{\mathrm{v}_{\mathrm{w}}}{\mathrm{v}_{\mathrm{bw}}}=\frac{1}{2} \\
\theta=30^{\circ} \\
90^{\circ}+\theta=120^{\circ}
\end{array}$
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