Question

Rain is falling vertically downward with a speed of 35m/s .wind blowing after sometimes with a speed of 12 m/s in east to west direction in which direction should a boy waiting the bus stop holding his umbrella

Answer 1

Here after making diagram you observe tanx=12/35.
Here x is angle of holding umbrella in east direction.

Answer 2

If the wind is blowing in the West direction the the rain will also go in the West direction.
So the boy should hold hota umbrella against the wind i.e. in the east direction.