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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 m from its base is `30^@`. If the angle of elevation at the same point is to be `45^@`, then the pillar has to be raised to a height of how many meters ?

A

`59.4 m `

B

`61.4 m`

C

`62.4 m`

D

`63.4 m`

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