Question

a man is walking on a road with velocity 3km/hr. Suddenly rain starts falling. The velocity of rain is 10km/hr in vertically downward direction. The relative velocity of the rain with respect to to man is-

1.
$\sqrt{13} km \: per \: hour$
2.
$\sqrt{7 \: \:} km \: per \: hr$
3.
$\sqrt{109} \: km \: per \: hr$
4.
$13 \: km \: per \: hr$
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Answer 1

Answer:

The relative velocity of the rain with respect to to man is-  √109 km per hour (i.e option 3 is the correct answer)

Explanation:

A man is walking on a road with velocity 3km/hr

Suddenly rain starts falling. The velocity of rain is 10km/hr in vertically downward direction.

From the problem,

Let V(man)= Velocity of man = 3km/hr

V(rain) = Velocity of rain= 10km/hr

V(relative) = √V(man)^2+V(rain)^2

putting the values:

               = √(3)^2+(10)^2

              = √9+100

              = √109

hence the relative velocity of the rain with respect to to man is- √109km/hr

Answer 2

Answer:

the answer is root109 km/hr

Explanation: