Question
A projectile is fired from the surface of the earth with a velocity of 5 m/s and angle 
with the horizontal. Another projectile fired from another planet with a velocity of 3 m/s at the same angle follows a trajectory which is identical with the trajectory of the projectile fired from the earth. The value of the acceleration due to gravity on the planet is,
-
3.5
-
5.9
-
16.3
-
110.8
Solution
A.
3.5
If the trajectory is same for both the projectiles, their maximum height will be the same.
That is,
(Hmax)1 = (Hmax)2
i.e., 
