Question

10. To establish the height of a building, a person walks 120 m away from the building. At that point
an angle of elevation of 30° is formed when looking at the top of the building. Find the height of
the building
plss help me in this question
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Answer 1

Step-by-step explanation:

Let building be the opposite side and the ground of 120 m be the adjacent side

And theta =30°

Tan theta = opposite side /adjacent side

Tan 30°=x/120

1/ root 3= x /120

x = 120/root 3

x = 120 ×root 3 / root 3 ×root 3

x = 120 ×root 3 /3

x= 40 root 3

x = 69.28 m