math

Sam in 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. C = pi * d

    C = 3.14 * 18

    C = 56.52 feet

    54 inches = 4.5 feet

    56.52 / 4.5 = 12.56 = 13 strands

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    Ms. Sue
  2. 18*3.14=56.52

    56.52÷4.5=12.56

    13 strands

    Hwa needs 13 strands to surround the patio edge.

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  3. Circumfrance= piXdiameter
    C=piX18
    56.548
    FEET INTO INCHES
    56.548X(12)=678.576
    DIVIDE 678.576 BY 54
    678.576 DIVIDED BY 54= 12.566 ROUNDED TO 12.56
    12.56 strands of light are needed to surround the patio edge.

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  4. The lights come in lengths of 54 inches; you need to ceiling it up to 13

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