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//Height from which stone fell
//refer fig.12.7
//Let the stone be dropped from A at a height h above window
//h=(g*t^2)/2 ...(1)
//h+2.45=((g)*(t+0.5)^2)/2 ...(2)
//from (1) and (2)
t=0.2495 //sec
g=9.81 //m/sec^2
h=(g*t^2)/2 //m
printf("\nh=%.3f m",h)
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