The angle of elevation of the top of a tower at a distance of 120 m from a point A on the ground
The angle of elevation of the top of a tower at a distance of 120 m from a point A on the ground is 45 ∘ . If the angle of elevation of the top of a flagstaff fixed at the top of the tower, at A is 60 ∘ , then find the height of the flagstaff. [Use root 3 =1.73]