SOLUTION: The perimeter of a rectangle is 128 cm. The width is 3 times the length. What are the dimensions of the rectangle?

Algebra ->  Equations -> SOLUTION: The perimeter of a rectangle is 128 cm. The width is 3 times the length. What are the dimensions of the rectangle?      Log On


   

Question 1072799: The perimeter of a rectangle is 128 cm. The width is 3 times the length. What are the dimensions of the rectangle?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
For a rectangle,
P=2%28L%2BW%29
So,
2%28L%2BW%29=128
L%2BW=64
and
W=3L
Substituting,
L%2B3L=64
4L=64
Solve for L then use either equation to solve for W.