Question

The neighborhood association is buying timbers to put around the edge of the playground. The length of the playground is ft. The width is ft. What is the perimeter of the playground?


A. 89.75 ft
B. 89.25 ft
C. 178.25 ft
D. 178.75 ft

Answer 1

First, we must convert 51 1/8 and 38 1/4 to a decimal:

(51 × 8) + 1 = 409

Next, divide that by 8.

409 ÷ 8 = 51.125

Convert 38 1/4 using the same method.

(38 × 4) + 1 = 153

153 ÷ 4 = 38.25

The formula for perimeter is:

2l + 2w

Substitute:

2(51.125) + 2(38.25) = 178.75

The perimeter of the playground is A. 178.75 ft.