Question

A man can swim at 4m/s in a still swimming pool. he enters a 200m wide river at one bank and swims at an angle of 60degrees to the river flow velocity. The river flow velocity is 5m/s.How much time does he take to cross the river? Calculate his drift?​

Answer 1

Answer:

time=100/√3s,

drift=700/√3m

Explanation:

given:

width of river=200m

man swims in angle=60°

man can swim at velocity=4m/s

velocity of river=5m/s

To find: time taken to cross the river and drift

time taken to cross the river

t=d/v

=d/vm sin alpha

=200×2/4×√3

=100/√3s

drift of river

d=u××t

=7×100/√3

=700/√3m

Answer 2

Answer is given above....