SOLUTION: The ratio of length to width in a rectangle is 3 to 1. If the perimeter of the rectangle is 128 feet, what is the length of the rectangle?

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Question 847928: The ratio of length to width in a rectangle is 3 to 1. If the perimeter of the rectangle is 128 feet, what is the length of the rectangle?
Found 2 solutions by Fombitz, ewatrrr:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
L%2FW=3%2F1
L=3W
Also,
P=2%2AL%2B2%2AW=128
L%2BW=64
Substitute,
3W%2BW=64
4W=64
W=16
Then
L=3%2816%29=48

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,



P = 2l + 2w = 128ft    0r l + w = 64

Let x represent the length of the rectangle

3%2F1+=+x%2F%2864-x%29    | Cross Multiplying to solve for x

 4x = 192ft

  x = 48ft, the length of the rectangle