SOLUTION: The length of a rectangle is three times the width. The perimeter of the rectangle measures 72 inches. How long is the length of the rectangle?

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Question 61038: The length of a rectangle is three times the width. The perimeter of the rectangle measures 72 inches. How long is the length of the rectangle?
Answer by joyofmath(189) About Me  (Show Source):
You can put this solution on YOUR website!
L=3W
P=72
The perimeter of a rectangle, P, = 2W%2B2L.
So, 2W%2B2L=72. Replace L with 3W and you get
2W%2B2%2A3W=72
Or 2W%2B6W=72
Or 8W=72
So, W=9
The length, L, is 3 times the width so L=27.
Verification:
2W%2B2L=72. 2%2A9%2B2%2A27+=+18%2B54+=+72.