To measure the height of a tree, a surveyor walked a short distance from the tree and found the angle of elevation was 43.9°, then walked 20 feet farther and measured the angle of elevation to be 37.6°. Find the height of the tree.

The height of the tree is H = 77.06 m

Step-by-step explanation:

From Δ ABC

AB = height of the tree

h = 0.9623 x ------- (1)

From Δ ABD

h = 0.77 (x + 20) ----- (2)

Equating Equation  1 & 2 we get

0.9623 x =  0.77 (x + 20)

0.9623 x = 0.77 x + 15.4

x (0.1923) = 15.4

x = 80.08 m

Thus the height of the tree is given by

H = 0.9623 x

H = 0.9623 × 80.08

H = 77.06 m

Therefore the height of the tree is H = 77.06 m

y = x + 95

y = 42 + 95

y=137 mm hg