Question

The length of a rectangle is twice its width.

If the perimeter of the rectangle is 42 in, find its length and width.

Answer 1

Answer: Width = 7 inches, Length = 14 inches

Explanation:

Let the width be
`w`. Then, the length is
`2w`.

Using the formula for the perimeter of a rectangle,

`2(w+2w)=42\\\\w+2w=21\\\\3w=21\\\\w=7\\\\\implies 2w=14`