A stationary man observes that the rain is falling vertically downward. When he starts running with a velocity of $12\,\,km/h$ he observes that the rains is falling at an angle $60^o$ with the vertical. The actual velocity of rain is
A stationary man observes that the rain is falling vertically downward. When he starts running with a velocity of $12\,\,km/h$ he observes that the rains is falling at an angle $60^o$ with the vertical. The actual velocity of rain is
- A
$12\sqrt 3\,\,km/h$
- B
$6\sqrt 3\,\,km/h$
- C
$4\sqrt 3\,\,km/h$
- D
$2\sqrt 3\,\,km/h$
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