Question

The speed of a swimmer in still water is 20m/s. The speed of River water is 10 m/s and is flowing towards 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 strokes wrt North is

Answer 1

Answer:

30° west

Explanation:

Speed of swimmer in still water = Vsr = 20m/s (Given)

Speed of river water = Vrg = 10m/s (Given)

Thus, according to the equation -

Vsg =Vsr+Vrg

sinθ= |Vrg|/ |Vsr|  

sin θ=10/20  

sinθ =1/2  

θ = 30° west

Thus, the angle at which he should make his strokes wrt North is 30° west

Answer 2

Explanation:

I hope it helps you.......