A ball is projected horizontally from the top of a building 19.6 m high. If the line joining the point of projection to the point where it hits the ground makes an angle of 45° to the horizontal, the initial velocity of the ball is

Options

A. `4.9 ms^(-1)`
B. `9.8 ms^(-1)`
C. `19.6 ms^(-1)`
D. `14.7 ms^(-1)`

Answer

B