Question: It was calculated that a shell when fired from a gun with a certain velocity and at an angle of elevation 5π 36 rad should strike a given target. In actual practice, it was found that a hill just prevented the trajectory. At what angle of elevation should the gun be to hit the target?
(A) \dfrac{5\pi }{36}rad
(B) ]\dfrac{11\pi }{36}rad
(C) ]\dfrac{7\pi }{36}rad
(D) ]\dfrac{13\pi }{36}rad
Answer: option (D)
Solution:
