Two cannons are arranged vertically, with the lower cannon pointing upward (towards the upper cannon) and the upper cannon pointing downward (towards the lower cannon), 200m above the lower cannon. Simultaneously, they both fire. The muzzle velocity of the lower cannon is 25m/s and the muzzle velocity of the upper cannon is 55m/s.
How far beneath the top cannon do the projectiles collide?
(A) 31 m
(B) 67 m
(C) 110 m
(D) 140 m
(E) 170 m
Attempts left: 2
(question id: 27)