Question

a swimmer tries to swim at angle theta with the upstream in a river if he want to cross it through shortest path the time taken in such crossing is 20 minutes however the minimum possible time to swim across the river by him is 12 minutes it can be concluded that theta is equal to​

Answer 1

Answer:

To cross the river in shortest distance, a swimmer should swim making angle theta  with the upstream. What is

the ratio of the time taken to swim across in the shortest time to that in swimming across over shortest

distance. [Assume speed of swimmer in still water is greater than the speed of river flow]