Question

The length of a rectangle is twice the width. the area is 72 square centimeters. what is the length?

Answer 1

Assuming width = y
Length = 2y


`2y * y = 72 \\ 2 {y}^(2) = 72 \\ {y}^(2) = 36 \\ y = 6`
Width = 6cm, Length = 12cm

The answer is 12cm.

Hope this helps.