SOLUTION: the length of a rectangle is twice its width the area of the rectangle is 648 what are the dimensions (length and width) of the rectangle? what is the perimeter?

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Question 245630: the length of a rectangle is twice its width the area of the rectangle is 648 what are the dimensions (length and width) of the rectangle? what is the perimeter?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
L=2W
AREA=LW
648=LW
648=2W*W
648=2W^2
W^2=648/2
W^2=324
W=SQRT324
W=18 ANS. FOR THE WIDTH.
L=2*18=36 ANS. FOR THE LENGTH.
PROOF:
18*36=648
648=648
P=2L+2W
P=2*18+2*36
P=36+72
P=108 ANS. FOR THE PERIMETER.