Question

. A swimmer swim with a speed 20m/s with respect to ground at an angle 30° with river flow direction. The width of river is 80m. Then find out the time to cross the river by the swimmer
ans​

Answer 1

Answer:

V

SR

=20m/s

V

RG

=10m/s

V

ˉ

SG

=

V

ˉ

SR

+

V

ˉ

RG

So,

sinθ=

∣

V

ˉ

SR

∣

∣

V

ˉ

RG

∣

sinθ=

20

10

⟹sinθ=

2

1

⟹θ=30

o

west

Answer 2

Answer:

The correct option is (1) 30° west