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A ball is allowed to fall from top of a ...

A ball is allowed to fall from top of a building. If `t_(1)` is time taken to fall first `(1)/(4)` of its height and `t_(2)` is time taken to fall last `(1)/(4)` of its height then, `t_(2)/t_(1)` is
(A) `(sqrt(3-2))/(1)`
(B) `(sqrt(3)-sqrt(2))/(1)`
(C) `(sqrt(2-3))/(1)`
(D) `(2-sqrt(3))/(1)`

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