Question

An observer having a gun observes a remotely controlled balloon. When he first noticed the balloon, it was at an altitude of 800 m and moving vertically upward at a constant velocity of 5 m/s. The horizontal displacement of balloon from the observer is 1600 m. Shells fired from the gun have an initial velocity of 400 m/s at a fixed angle q (sin q = 3/5 and cos q = 4/5). The observer having gun waits (for some time after observing balloon) and fires so as to destroy the balloon. Assume g = 10 m/s2. Neglect air resistance.

PROPER SOLUTION PLEASE

Answer 1

I also asked this question in school and they provided me this screenshot