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A piece of stone is allowed to fall from...

A piece of stone is allowed to fall from a balloon floating in air. It goes down past a tower 30 m in height in the last quarter of the last second of its flight.Find the height of the stone at the instant when it was dropped and its velocity as it reaches the ground. `(g=9.8 ms^(-2))`

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The correct Answer is:
749.54 m , `121.21 ms^(-1)`
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