SOLUTION: the length of a rectangle is twice its width.the area of a rectangle is 162 inch squared find the perimeter.

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Question 30567: the length of a rectangle is twice its width.the area of a rectangle is 162 inch squared find the perimeter.
Answer by Cintchr(481) About Me  (Show Source):
You can put this solution on YOUR website!
A = l * w
l = 2w
A = 162 in^2
+A+=+lw+ substitute the values in
+162+=+2w+%2A+w+
+162+=+2w%5E2+
+81+=+w%5E2+
+9+=+w+ substitute 9 in to find the length
+l+=+2w+
+l+=+2%2A9+
+l+=+18+ substitute the L and W in to find perimeter
+P+=+2%28l%2Bw%29+
+P+=+2%2818+%2B+9%29+
+P+=+2%2827%29+
+P+=+54+