SOLUTION: The length of a rectangle is three times the width. The area is 27 square centimeters. Find the perimeter.

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Question 345347: The length of a rectangle is three times the width. The area is 27 square centimeters. Find the perimeter.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Hi,
L = 3*W
Using the formula for the area of a rectangle:
L*W = A
%2833%2AW%29%28W%29+=+27cm%5E2
33%2AW%5E2+=+27cm%5E2
.
W%5E2+=+%2827%2F33%29cm%5E2
.
W%5E2+=+.8181cm%5E2
W+=+sqrt%28.8181cm%5E2%29
.
W=%28.9045%29 and L = 3*(.9045) = 2.7135
P = 2*L + 2*W = 7.2359cm