Question

A boy can throw a stone up to a maximum height of 10m. The maximum horizontal distance that the boy can throw the same stone up to will be
(a) 10m 

(b) 10√2m

(c) 20m 

(d) 20√2m

Answer 1

(c) : Let u be the velocity of projection of the stone.
The maximum height a boy can throw a stone is

The maximum horizontal distance the boy can throw the same stone is