Question

A person can swim with twice the velocity of flow of water in a river. To reach the exactly opposite bank, the angle to be made with the direction of flow is​

Answer 1

Answer:

Correct option is

C

0.25 m/s

The angle made by the person swimming with the direction perpendicular to the flow of water is 120

∘

−90

∘

=30

∘

To reach the point B, drift must be zero, i.e., the relative velocity of boat w.r.t. river, v

br

, should be along perpendicular direction.

Equating the component of velocity along horizontal direction to zero,

v

b

sinθ−v

r

=0

sin30

∘

=

0.5

v

water

or

v

water

=

2

1

×0.5=0.25m/s

Answer 2

Answer:

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