Question

The angle of elevation of the top of a tower from the a point on the ground 30m away from the foot of the tower is 30°. The height of the tower is

(a) 30m

(b) 10√3

(c) 20m

(d) 10√2

Answer 1

Correct answer is (b)

Let AB be the tower and O be the point of observation. 

Also,

∠AOB = 30° and OB = 30m

Let:

AB = h m

Hence, the height of the tower is \(10\sqrt{3}\,m.\)