Question

A person wants to reach exactly opposite point on
the other bank of a 1 km wide river. If he swims
with speed 4 m/s at an angle 120° with direction
of flow of water. The rate of flow of river is
(1) 2 m/s
(2) 1 m/s
(3) 2.5 m/s
(4) 1.5 m/s

Answer 1

Answer:

1) 2m/s

Explanation:

the angle is (120-90) =30*

=4*sin30

=4*(1/2)

=2m/s