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To a man running at a speed of 5 m/sec, ...

To a man running at a speed of 5 m/sec, the rain drops appear to be falling at an angle of `45^(@)` from the vertical. If the rain drops are actually falling vertically downwards, then its velocity in m/sec is

A

`5`

B

`5sqrt(3)`

C

`5sqrt(2)`

D

`4`

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