06-09-2016
Mathematics

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a 12 ft by 15 ft swimming pool has a 3 ft wide no slip surface around it. what is the outer perimeter of the no slip surface?

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06-09-2016

just add 3 to each dimention twice for each side

12+3+3=18
15+3+3=21

perimiter=2(L+W)
P=2(21+18)
P=2(39)
P=78
aswer is 78ft

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