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Angle of elevation is the angle which li...

Angle of elevation is the angle which line of sight makes with the horizontal. Angle of elevation of the top of a tall building is `30^(@)` from a place A and becomes `60^(@)` from another place B that is `10sqrt()3` m from A towards the building as shown in the figure. Height of the building is close to

A

a) 7.5 m

B

b) 10 m

C

c) 12.5 m

D

d) 15 m

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The correct Answer is:
D
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