Question

A river flows at 3 m/s and is 300 m wide. A man
swims across the river with a velocity of 2 m/s
directed always perpendicular to the flow of current.
(1) How long does it take the man to cross the river?
(ii) In what direction does he actually move relative
to the shore? (iii) How far down the stream (from
the starting point) does he reach the opposite bank?​

Answer 1

Answer:

300 divide(2+3）equalz 60meters per second

Answer 2

Answer:

a)2.5 mins

b)tan(inv)2/3

c)450m

let velocity of river=Vr=3m/s

velocity of man=Vm=2m/s

a)velocity=distance/time

2 =300/time

time. = 300/2

time=150 s =2.5 mins

b)tan theta=2/3

theta=Tan (inv). 2/3

c)distance=Vr * time

=3*150=450 m