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The angle of elevation of the top of an ...

The angle of elevation of the top of an unfinished tower from a point at a distance of 120 metres from its bace is `45^(@)`. The height of the tower that must be raised so that the angle of elevation at the same point may be `60^(@)` is

A

`120(sqrt3-1)m`

B

`120(sqrt3+1)m`

C

`120sqrt3m`

D

`140(3m`

Text Solution

Verified by Experts

The correct Answer is:
A
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