A) \[60{}^\circ \]
B) \[150{}^\circ \]
C) \[90{}^\circ \]
D) \[120{}^\circ \]
Correct Answer: D
Solution :
[d] |
For swimmer to cross the river straight |
\[\Rightarrow 4\sin \theta =2\]\[\Rightarrow \sin \theta =\frac{1}{2}\Rightarrow \theta ={{30}^{o}}\] |
So, angle with direction of river flow \[=90{}^\circ +\theta =120{}^\circ \] |
Option [d] |
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