SOLUTION: The perimeter of a rectangle is 12 cm. Its length is twice its width. Find the rectangle. Is it x(2x)^2=12

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Question 957156: The perimeter of a rectangle is 12 cm. Its length is twice its width. Find the rectangle.
Is it x(2x)^2=12
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
No.
The perimeter of a rectangle is,
P=2%28L%2BW%29
So,
2%28L%2BW%29=12
L%2BW=6
But you also know,
L=2W
Substituting,
2W%2BW=6
3W=6
W=2cm
So then,
L=2%282%29
L=4cm