SOLUTION: A rectangle is twice as long as it is wide. its perimeter is 48cm find its dimension.

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Question 286483: A rectangle is twice as long as it is wide. its perimeter is 48cm find its dimension.
Answer by texttutoring(324) About Me  (Show Source):
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Let l = length, w=width
l=2w (because the length is twice as long as the width)
The perimeter can be expressed by:
P=2w+2l
Substitute P=48 and l=2w into the equation:
48 = 2w + 2(2w)
48 = 2w + 4w
48 = 6w
w=8
The width is 8cm and the length is 16cm.