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The angles of elevation of the top of a ...

The angles of elevation of the top of a rock from the top and foot of a 100m. High tower are respectively `30^(@)and45^(@)`. What is the height of the rock?

A

`(sqrt(3)-1)/(100sqrt(3))m`

B

`(100sqrt(3))/(sqrt(3)-1)m`

C

`246.5m`

D

`236.5m`

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