Question

A contractor is pouring a concrete driveway. The perimeter is 108 ft. What length will the driveway be if the width is 12 ft.?

Answer 1

(12+l)*2=108

12+l=54

l=42

Answer: 42

Answer 2

The length will be 42 because perimeter is found by adding all the lengths of the sides together.

so:
(two sides) 12*2=24
108-24=84
84/2=42