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What is the length of a rectangle that has area of 392 sq cm and a length twice the width?
Wiki User
∙ 10y ago
A rectangle has 4 sides.
Let the width of the rectangle be y.
As the length of the rectangle is twice its width, it is 2y.
The sum of the 2 sides that are the width: 2 * y = 2y
The sum of the 2 sides that are the length: 2y * 2 = 4y
The perimeter equals the 2 widths and the 2 breadths: 2y + 4y = 6y
The perimeter: 6y = 60 cm
So: y = 10 cm
The length is 2y = 2 * 10 cm = 20 cm
Answer: 20 cm
Wiki User
∙ 14y ago
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