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A man throws a packet from a tower direc...

A man throws a packet from a tower directly aiming at his friend who is standing at a certain distance from the base which is same as the height of the tower. If the packet is thrown with a speed of `4 ms^(-1)` and it hits the ground midway between the tower base & his friend than the height of the tower is `(g = 10 ms^(-2))`

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