Question

How tall is the flagpole?
X
6 ft
15 ft
4.5 ft

Answer 1

x = 20 ft

Explanation:

We can use similar triangles and ratios to solve

4.5 ft 6 ft

--------- = ---------------

15 ft x ft

Using cross products

4.5x = 15*6

4.5x =90

Divide each side by 4.5

4.5x/4.5 = 90/4.5

x =20