Two balls of equal masses are projected upward simultaneously, one from the ground with speed of 50 m/s and other from a 40 m high tower with initial speed of 30 m/s. Find the maximum height attained by their center of mass.

Q. Two balls A and B of equal masses are projected upward simultaneously, one from the ground with speed 50 $m{s}^{-1}$ and other from height 40 m above the first ball high tower with initial speed 30 $m{s}^{-1}$. Find the maximum height attained by their centre of mass.

Q. Two balls of equal mass are projected upwards simultaneously, one from the ground with initial velocity $50m{s}^{-1}$ and the other from a 40 m tower with initial velocity of $30m{s}^{-1}$. The maximum height attained by their centre of mass will be:

Q. Two balls of equal masses are projected upwards simultaneously, one from the ground with initial velocity $50{\text{ms}}^{-1}$, and the other from a $40\text{m}$ tower with initial velocity of $30{\text{ms}}^{-1}.$The maximum height attained by their COM will be:
($g=10{\text{ms}}^{-2}$)

Q. Two particles of same mass are projected simultaneously with same speed $20m{s}^{-1}$ from the top of a tower of height $20m$. One is projected vertically upwards and other projected horizontally. The maximum height attained by centre of mass from the ground will be $(g=10m{s}^{-2})$

Q. Two balls are projected simultaneously with the same speed from the top of a tower-one upwards and the other downwards. If they reach the ground in 6s and 2s, the height of the tower is: