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Drops of water fall from the roof of a b...

Drops of water fall from the roof of a building 9m. High at regular intervals of time, the first drop reaching the ground at the same instant fourth drop starts to fall. What are the distance of the second and third drops from the roof?

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The correct Answer is:
(i) `t=2s`, (ii) `3.14 m//s`
(a) `pi=0+1/2xxpi/2 t^(@)rArr t=2` sec
(b) `v=0+pi/2xx2=pi m//s`
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