A man can swim at 3 km/hr in a static river. If he wants to cross a river of width 500 m in shortest possible time, then at what angle with repect to direction of motion he should move?
As we have learnt
Boat - River Problem -
To cross the river in the shortest time.
Drift along river flow
If he wants to cross the river in shortest possible time, then he must move along a direction per pendicular to direction of river flow.
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