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A man is moving with 10 m//s towards wes...

A man is moving with `10 m//s` towards west on a horizontal ground. He observed that the rainfall is falling vertically down wards. Now he increases his speed to `15 m//s` and find that now the rainfall at an angle of `45^(@)` towards him. The speed of the rain with respect to ground is :

A

`10 sqrt(5) m//s`

B

`10 m//s`

C

`5sqrt(5) m//s`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
A man is …….

`tan = (15-V_(x))/(V_(y)) implies V_(y) = 5`
`V = sqrt(V_(x)^(2)+V_(y)^(2)) = 5sqrt(5)`
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