Question

Problem 51. Two towers AB and CD are situated a
distance d apart as shown in figure. AB is 20 m high and CD is
30 m high from the ground. An object of mass m is thrown
from the top of AB horizontally with a velocity of 10 m/s
towards CD.
Simultaneously another object of mass 2 m is thrown
from the top of CD at an angle of 60° to the horizontal
towards AB with the same magnitude of initial velocity as
that of the first object. The two objects move in the same
vertical plane, collide in mid-air and stick to each other.
(1) calculate the distance d between the towers,
(ii) find the position where the objects hit the ground.
(g = 9.8 m/s2)
(JEE 1994)
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Answer 1

Answer:

the distance is 10 root 3