SOLUTION: Olivia wants to trim a lampshade with braid. The lampshade is shaped like a rectangular prism. The length of the base of the lampshade is 4 inches greater than its width. If the pe

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: Olivia wants to trim a lampshade with braid. The lampshade is shaped like a rectangular prism. The length of the base of the lampshade is 4 inches greater than its width. If the pe      Log On

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Question 1071936: Olivia wants to trim a lampshade with braid. The lampshade is shaped like a rectangular prism. The length of the base of the lampshade is 4 inches greater than its width. If the perimeter of the base is 54 inches, find the length of the base.
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
2length + 2width = perimeter
length = w+4 or w = l-4
2l + 2(l-4) = 54
2l + 2l-8 = 54
4l = 62
l = 15.5
w = 15.5-4 = 11.5
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Check:
2(11.5) + 2(15.5) = 23+31 = 54 Correct
:
John