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A stone falling from the top of a vertic...

A stone falling from the top of a vertical tower has descended `x` metre when another is dropped from a point `y` metre, below the top. If they fall from rest and reach the ground together, show that the height of the tower is `(x+y)^(2)/(4x) m`.

A

`((x + y)^2)/(4x) m`

B

`(4(x + y)^2)/(x) m`

C

`(4x)/((x + y)^2) m`

D

`4x (x + y)^2 m`

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The correct Answer is:
A
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