Question

A man can swim with a certain speed, in still water to cross a river to a point directly opposite to the starting point in time to. When the
river flows, he crosses the river directly along the same path in time t, . If 'd' be the river width, then the velocity of water current is
​

Answer 1

Answer:

Here V

R

= velocity of river

V

M

= velocity of man in still water = 2m/s (given)

from figure it is clear that

sinθ=

V

M

V

R

, where θ=60 degree

⟹V

R

=

3

m/s

from figure it is evident that

V

M

cosθ×t=1000m

⟹t=1000 s