A ball is proejcted 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

A ball is proejcted horizontally from the top of a building 19.6 m hig

1.	A ball is proejcted 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
Answer» `4.9ms^(-1)` `9.8ms^(-1)` `19.6ms^(-1)` `14.7ms^(-1)` ANSWER :B