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Two friends decided to calculate hight o...

Two friends decided to calculate hight of a high rise building . the match the timeing of their watch. one friend goes to the top stair and the other sands on ground.the frind at the top storey droup a stone and notes the time. The friend standing on ground notes the time when the stone reaches the ground. They meet and find that the time taken by stone to reach the ground is 3 second. Find he height of the high-rise building.

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MODERN PUBLICATION-GRAVITATION-EXAMPLE
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  3. A particle is thrown up vertically with a velocity of 50 m/s. How high...

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