Fred wants to put a fence around his two square gardens using wooden planks. Each side of the smaller garden is 9 feet long. Each side of the larger garden is 2 times as long as each side of the smaller garden. What is the total length, in feet, of the wooden planks needed to go around both gardens?
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Perimeter of small garden is 4*9=36
Perimeter of big garden is 4*18 =72
Total =36+72=108
Perimeter of big garden is 4*18 =72
Total =36+72=108
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