A man standing on flat car under the shed of a small umbrella as shown in figure. Rainfall starts at 30m/s at an angle `30^(@)` with the vertical as shown. Find the speed and direction in which flatcar should be moved in order to save man from rain fall.

Options

A. 15m/s toward right
B. 15m/s towards left
C. `15sqrt(3)` m/s toward right
D. `15sqrt(3)` m/s toward left

Explanation

Velocity of rain with respect to can should be vertical.
`v_(re)rArr(-15-v_(c))hati-15hatj`
`-15-v_(c)=0`
`v_(c)=v_(c)hati`
`v_(c)=-15m//sec(hati)`