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To a man walking at 5kmph rain appears t...

To a man walking at 5kmph rain appears to fall vertically, and when he doubles his speed it appears to make an angle of `30^(@)` with the vertical. Find the actual velocity of the rain. In what direction will rain appear to fall if the man suddenly turns around when his speed is 5 kmph?

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The correct Answer is:
10 kmph at `30^(@)` to the vertical from behind, at `49^(@)6`' from the front
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NN GHOSH-COMPOSITION AND RESOLUTION OF VELOCITIES-Exercise
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  5. A motorboat going downstream overcome a raft at a point A, tau=60min l...

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