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12 June, 11:08

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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  1. 12 June, 11:20
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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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