SOLUTION: The length of a rectangle is five times its width. If the area of the rectangle is 320cm^2 , find its perimeter

SOLUTION: The length of a rectangle is five times its width. If the area of the rectangle is 320cm^2 , find its perimeter

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Question 509236: The length of a rectangle is five times its width.
If the area of the rectangle is 320cm^2 , find its perimeter

Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
The formula for perimeter is:

The formula for area is:

given:
cm2
(1)
----------
(2)
(2)
Substitute (2) into (1)

and, since

The length is 40 cm and the width is 8 cm
so, the perimeter is

cm
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