A fighter plane flyinghorizontally at an altitude of 1.5 km with speed 720 km *h^(-1) passes directly over an anti-aircraft gun. At what angle with the vertical shouldthegun be firedfor the shell with muzzle speed 600 m*s^(-1) to hit the plane? At what minimum altitude should the pilot fly the plane to avoid being hit ? (Take g=10 m*s^(-2)).

A fighter plane flyinghorizontally at an altitude of 1.5 km with speed

1.	A fighter plane flyinghorizontally at an altitude of 1.5 km with speed 720 km h^(-1) passes directly over an anti-aircraft gun. At what angle with the vertical shouldthegun be firedfor 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 ? (Take g=10 m*s^(-2)).
Answer» ANSWER :at an ANGLE of `SIN^(-1)(1/3)=19.5^@` withthe vertical ; 16km