Asked by Abhishek

The length of a rectangle is twice it's width. If it's perimeter is 54cm, find its length. Explain!
Answered by Damon
2 L + 2 w = 54
so
w = 27 - L

also w = L/2
so
L/2 = 27 - L

3 L/2 = 27
L = 18
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