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A lamp post is sittuated at the middle p...

A lamp post is sittuated at the middle point M of the side AC of a triangular plot ABC with BC=m CA =8 m and AB =9 m. Lamp post subleds an anlgle `15^(@)` at the point B. The height of the lamp post is

A

`7(2+sqrt(3))m`

B

`7(2-sqrt(3))m`

C

`14(2-sqrt(3))m`

D

`14(2+sqrt(3))m`

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The correct Answer is:
B
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