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  1. From a point 20 m away from the foot of a tower, the angle of elevation of the top of the tower is 30°. The height of the tower is
    1. 10 √3 m
    2. 20 √3 m
    3. 10
      		m
      √3
    4. 20
      		m
      √3
Correct Option: D


AB = Tower, BC = 20 metre
In ∆ ABC.

tan 30° =
AB
BC

⇒
1
=
AB
√320

⇒ AB =
20
metre
√3


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