Question

A swimmer wants to cross the river in shortest possible time, the angle θ made by the swimmer with flow of river is

Answer 1

the angle made will be 0

Answer 2

Answer:

Explanation:

t = d/vr cosθ

d= width of the river

vr  =velocity of river

cosθ

for t to be minimum

the inversely proportional value needs to be maximum

cosθ=1

θ=0