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

The angle of elevation of the top of an unfinished pillar at a point 150 metres from its base is `30^(@)` The height (in metres) that the pillar must be raised so that its angle of elevation at the same point may be `45^(@)` , is (Take, `sqrt(3)=1.732)`

A

`63.4 `

B

`86.6`

C

`126.8`

D

`173.2`

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The correct Answer is:
C, D
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