Question

15.
A swimmer crosses a river in shortest distance. If
he tries to swim at 4 km/hr maintaining 120° with
the downstream then speed of the river is
(1) 1 km/hr
(2) 2 km/hr
(3) 3 km/hr
(4) 4 km/hr​

Answer 1

Answer:

3. 3km/hr

i think may be it is correct