SOLUTION: The length of a rectangle is 3cm less than twice the width. The perimeter of the rectangle is 72cm. Find the length and width of the rectangle.
I need help setting up the correc
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I need help setting up the correc
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Question 576912: The length of a rectangle is 3cm less than twice the width. The perimeter of the rectangle is 72cm. Find the length and width of the rectangle.
I need help setting up the correct formula to find the answer, I tried a couple and my answer is still wrong. Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! The length of a rectangle is 3cm less than twice the width.
The perimeter of the rectangle is 72cm.
Find the length and width of the rectangle.
:
The perimeter
2L + 2W = 72
:
It say's,"The length of a rectangle is 3cm less than twice the width.". therefore:
L = 2W - 3
:
Replace L in the 1st equation with (2W-3)
2(2W-3) + 2W = 72
Mult what's inside the brackets
4W - 6 + 2W = 72
4W + 2W = 72 + 6
6W = 78
W =
W = 13
:
Now you should be able to find L. Then check the perimeter with those values
