A ball is thrown from the ground to clear a wall 3 m high at a distance of 6 m and falls 18 m away from the wall. Find the angle of projection of ball.

Options

A. `alpha = tan^-1 (1/3)`
B. `alpha = tan^-1 (2)`
C. `alpha = tan^-1 (2/3)`
D. `alpha = tan^-1 (2/4)`

Answer

C