SOLUTION: The length of a rectangle is twice its width. If the perimeter of the rectangle is 30cm , find its area.

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Question 145846: The length of a rectangle is twice its width. If the perimeter of the rectangle is 30cm , find its area.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
2L+2W=30
L=2W
2(2W)+2W=30
4W+2W=30
6W=30
W=30/6
W=5 FOR THE WIDTH.
L=2*5=10 FOR THE LENGTH
PROOF:
2*5+2*10=30
30=30
5*10=50 FOR THE AREA.