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Let Q be the foot of the tower PQ and R ...

Let `Q` be the foot of the tower PQ and R cuts the tower such that `RQ=15 cm`. Let S be any point on ground such that angle of elevation of R from S is `60^@` and PR makes an angle `15^@` on S . Then height of tower is :

A

`10(sqrt3+1)`

B

`10(sqrt3-1)`

C

`5sqrt3(2+sqrt3)`

D

`5sqrt3(2-sqrt3)`

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