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Two towers AB and CD are situated a dist...

Two towers AB and CD are situated a distance d apart as: shown in Fig. 1E.139 (a). AB is 20 m high and CD is 30 m high from the ground. An object of mass mis thrown from the top of AB horizontally with a velocity of 10 m/s towards CD.
Simultaneously another object of mass 2m 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' objects . The two objects move in the same vertical plane, collide in mid-air and stick to each other.
Calculate the distance d between the towers.

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