A fighter plane flying horizontally at an altitude of 1.5 km with speed 720 km/h passes directly overhead an antiaircraft gun. At what angle from the vertical should the gun be fired for the shell with muzzle speed `600 ms^(-1)` to hit the plane? At what minimum altitude should the pilot fly the plane to avoid being hit ?

Options

A. `sin^(-1) (1/3) , 16km `
B. `cos^(-1) (1/3) , 18 km `
C. `sin^(-1) (1/3) , 6km `
D. `cos^(-1) (1/3) , 6km`

Answer

A