Answer:
Explanation:
Let the initial velocity of A and B be  2Uâ and Uâ at a common angle of θ.
At maximum height H Â , Velocity v =0
For vertical  displacement
Vertical component = Uâ Sinθ and
v² = u² - 2gH
H = u² / 2g
Hâ = (2Uâ sinθ)² /  2g
Hâ = (Uâ sinθ)² / 2g
Hâ /Hâ = 4/1