A person observes that the angle of elevation at the top

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A person observes that the angle of elevation at the top of a pole of height 5 metre is 30°. Then the distance of the person from the pole is :

1. 5 √3 metre
2. ⇒ 5 metre
  3
3. √3 metre
4. 10 √3 metre

Correct Option: A

AB = pole = 5 metre
∠ACB = 30°, BC = ?
In ∆ABC,

tan 30° =		AB	⇒	1	=	5
		BC		√3		BC

⇒ BC = 5 √3 metre