Question

Find d, the depth of the water.

- 721
40 ft
115ft
a. 27 ft
b. 8.3 ft
c. 192 ft
d. 33 ft

Answer 1

a

Explanation:

Consider the triangles to be similar, that is the the one on the left and the outer one. Then the ratios of corresponding sides are equal, that is

`(40)/(72)` =
`(15)/(d)` ( cross- multiply )

40d = 1080 ( divide both sides by 40 )

d = 27 ft → a