Question

A person walking in rain feels the velocity of rain as twice to his velocity. at which angle he should hold the umbrella with vertical if he moves forward if it is raining vertically downwards?

Answer 1

let the angle with the vertical be = Ф

Tan Ф = velocity of the person / velocity of rain
           = 1/2 
 
 angle Ф = Tan ⁻¹ 1/2