Question

To cross the river in shortest distance, a swimmer should swim making angle $\theta$ with the upstream. What is the ratio of the taken to swim across in the shortest time to that in swimming across over shortest distance. (Assume speed of swimming in still water is greater than than speed of river flow)

• A. $\cos \theta$
• B. $\sin \theta$
• C. $\tan \theta$
• D. $\cot \theta$

Answer 1

The correct option is B $\sin \theta$

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