A man is walking due east at the rate of `2kmph`.The rain appears to him to come down vertically at the rate of `2kmph`.The actual velocity and direction of rainfall with the vertical respectively are

Options

A. `2sqrt(2)` kmph, `45^(@)`
B. `(1)/sqrt(2)` kmph, `30^(@)`
C. 2kmph, `0^(@)`
D. 1kmph. `90^(@)`

Answer

a

Explanation

`v_(R)=sqrt(v^(2)+v_(m_^(2)), tan theta=(v_(m))/(v)`