Sam is placing rope lights around the edge of a circular patio with a diameter of 18 feet. The lights come in lengths of 54 inches.How many strands of lights does he need to surround the patio edge?

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you can find the circumference of the circle with the circumference equals 2pir. circumference=2pi9 circumference=18pi circumference=56.55 feet you can then turn the feet into inches by multiplying by 12 (56.55 feet)x(12inches/foot)=678.58 inches then divide 678.58 inches by 54 inches to find how many light strands are needed. (678.58 inches)/(54 inches/strand)=12.57 strands

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