SOLUTION: a rectangle has a length of 9 inches and a perimeter of 30 inches. what is the perimeter of a similar rectangle with a width of 3 inches.

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Question 742014: a rectangle has a length of 9 inches and a perimeter of 30 inches. what is the perimeter of a similar rectangle with a width of 3 inches.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
See carefully how the length of one rectangle is given and the width of the other similar rectangle is given.
First rectangle: 2%2A9%2B2%2Aw=30
9%2Bw=15
w=15-9=6
Dimensions: Length 9, Width 6.

Similar rectangle is of width 3, therefore, since distance dimensions are in proportion 3/6=1/2, the length is 9%2F2=highlight%284%261%2F2%29.
Dimensions: length 4%261%2F2, width 3.

Perimeter of this similar rectangle is 2%2A4.5%2B2%2A3=highlight%2815%29. Done.