To a man walking at

PHYSICS · Subjective · CBSE · Physics · Motion in a Plane · Motion in a Plane

Problem

To a man walking at

3\,\text{km h}^{-1}

, rain appears to fall vertically downwards. When he increases his speed to

6\,\text{km h}^{-1}

, it appears to meet him at an angle of

45^\circ

with the vertical. Find the speed of rain.