Rain is falling vertically with a speed of 35 m/s. Winds start blowing after sometime with a speed of

Explanation:

As per the figure above, R is the resultant velocity of the raindrop.

The umbrella should be handled in a direction opposite to the resultant velocity. So the direction of the umbrella will be 18.92° towards east.

Final Answer:

Hence, the boy waiting at a bus stop should hold his umbrella at 18.92° towards east.