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Question

A man wishes to swim across a river 0.5 km wide. If he can swim at the rate of 2 km/h in still water and the river flows at the rate of 1 km/h. The angle (w.r.t the flow of the river) along which he should swim so as to reach a point exactly opposite his starting point, will be

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Solution

The correct option is **A** 120∘

vr=vmrsinθ

⇒1=2sinθ

so θ=30∘

Φ=90∘+30∘=120∘

vr=vmrsinθ

⇒1=2sinθ

so θ=30∘

Φ=90∘+30∘=120∘

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