Question

A man moves on a horizontal road towards east at
a speed of 1 km/hr and the rain appears to him
vertical at a speed of 2 km/hr. The actual speed of
the rain (in km/hr) is
(1) 1
(2) 2
(3) 13
(4) V5​

Answer 1

Answer:

HELLO! YOUR ANSWER IS HERE,

ANSWER IS OPTION (4)

EXPLANATION :-

#GIVEN, Vm =1Kmph

Vrm = 2 kmph

#SOLUTION ,

Relative velocity of rain wrt man is ,

Vrm =Vr - Vm

Vr =Vrm+Vm

In terms of magnitude ,

Vr

$= \sqrt{(2 {}^{2} } + 1 {}^{2} )$

$\sqrt{4 + 1 }$

$= \sqrt{5}$

THANK YOU :)