Question

The angle of elevation of the top of a building from a

Let AB bee the height of the building. In ACD and ABC ACB CAD CDA 60 CAD 30 CAD 30 So, AC CD AC 40 m cosec 60 ACAB 23 40AB AB 203

point on the ground is 30° and moving 40 meters towards the building it becomes 60°. The height of the building is.

A 20 m

B 20/√3 m

C 20√3 m

D 25√3 m

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