# Question #deeb3

##### 2 Answers

In figure

AB = h ft = Height of the building

C is the point on the ground from which angle of elevation of building

D is the point on the ground(50 ft closer to the building from C) from which angle of elevation of building

Let BD = x ft

Now

Again

Height of building

#### Explanation:

Let line AB be the building with A the top.

Let C be the first point with ascending angle 30°20'

Let D be the second point with ascending angle 45°

In triangle ACD

In triangle ACD:

Multiply both sides by

In triangle ADB

AB=height of building=opposite side