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A radio transmitter antenna of height 10...

A radio transmitter antenna of height 100 m stands at the top of a tall building. At a point on the ground, the angle of elevation of bottom of the antenna is `45^@` and that of top of antenna is `60^@`. What is the height of the building ?

A

100 m

B

50 m

C

`50(sqrt(3)+1) m`

D

`50(sqrt(3)-1)m`

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