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

Ashik asked Aug 24, 2023

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8 votes

The length of a rectangle is twice its width.

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

Ashik asked Aug 24, 2023

by Ashik

3.2k points

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14 votes

Answer: Width = 7 inches, Length = 14 inches

Explanation:

Let the width be
. Then, the length is
.

Using the formula for the perimeter of a rectangle,

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

Sarp answered Aug 30, 2023

by Sarp

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