Please solve the question given in the description

Say     h= 150-x  meters

Consider angle at B

tan5= opposite side / adjacent side= x / 1200 = 0.0875

x= 0.0875 X 1200=105 m.

Now consider angle at C

tan 5= x/DF  =(AD-CF) / (DF) =0.0875

DF= (150-20) / 0.0875= 1485.7 m= 1.4857 Km

Since the 20stair building is at athe city centre DE is the distance if the tower from the city centre

 Regards

Topperlearning Team