Question

Derek wants to determine the height of the top of the backboard on the basketball goal at the playground. He places a standard 12-inch ruler next to the goal post and measures the shadow of the ruler and the backboard. If the ruler has a shadow of 10 inches and the backboard has a shadow of 8.5 feet, then how high is the top of the backboard?

Answer 1

Cross multiply and solve for x

12/10 = x/8.5

Answer 2

x=8.18

Answer 3

its 9.82

Answer 4

its 10.8