Tue March 08, 2011 By: Arunima Iyer

A ball is dropped by a boy A from the top of a tall building. An observer B inn some floor observes that the ball takes 0.1 second to cross the height of the window (through which he is watching) of height 1.55m.If the total time taken by the ball to travel from the top to bottom of the building is 3 seconds, what is the height of the top portion of the window from the ground.

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Wed April 13, 2011
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