1.a bullet fired from a rifle,attains a maximum height of 25m and crosses a range of 200m.find the angle of projection.

2.find the range of ball,which when projected with a velocity of 29.4 m/s just passes over a pole 4.9 m high.

3.a projectile is thrown from a point 39.2 m away from the foot of a building 19.6m high and just reaches the top horizontally .find the velocity of projection and the angle of throw.