# Find the Height (in metres) of the Telegraph Post :

A telegraph post is bet at a point above the ground due to storm. Its top just touches the ground at a distance of 10√3m from its foot and makes an angle of 30^{o} with the horizontal. Then height (in metres) of the telegraph post is

- 24
- 25
- 30
- 20

**Answer is (3): 30**

**Explanation:-**According to the question ,

In the figure,

Let the height of the telegraph post be h m

Then, in right triangle ABC,

tan 30 degree = BC/AB

sqrt.3 = h/10 sqrt.3

h = 10 sqrt.3 x sqrt.3

h = 10 x 3

h = 30 m

Then, the height of the telegraph pole is 30 m.

Hence, the answer is (3) 30