The speed of a swimmer in still water is 20 m/s. The speed of river water is 10 m /s and due east. If he is standing on the south bank and wishes to cross the river along the shortest path the angle at which he should make his stroke w.r.t. north is given by :-
Text Solution
Verified by ExpertsThe correct answer is:
B
For shortest path, velocity along river flow is zero.
20 sin θ = 10 ⇒ 
θ = 30º West
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