Question

The horizontal distance between two towers is 70m. The angles of depression of the top of the first tower, when seen from the top of the second tower is 30°. If the height of the second tower is 120m, find the height of the first tower. (Pls the answer is supposed to be 79.6m)

Answer 1

let height of the first tower be x + 120m

tan 30° = x/70
 
1/√3 = x/70

x = 70/√3

x = 40.41m

h = x + 120 = 40.41 + 120 = 160.41

Hey, to my knowledge this is the answer.
Maybe your answer has a printing mistake.
Anyway, hope this helps.