A rectangle is 2 times as long as it is wide. If the area is 18 square feet, find its perimeter.

Question

I need this question solved. Find the perimeter.

Answer 1

Let L = length and W = width

L = 2W

 

LW = area = 18

Substitute

2W² = 18 => W² = 9 and W = 3

 

Then L = 6

 

Perimeter = 2(L + W) = 2(6 + 3) = 18