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21 January, 10:45

Jun used 56cm of ribbon to go around the edge of a rectangular lid. The lid was 13 cm long. What is the width of the lid?

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Answers (2)
  1. 21 January, 10:51
    0
    The width of the rectangular lid is 15 cm.

    Step-by-step explanation:

    1. Let's review the information given to us to answer the question correctly:

    Length of the ribbon used by Jun = 56 cm

    Length of the rectangular lid = 13 cm

    2. What is the width of the lid?

    The ribbon used by Jun is equivalent to the perimeter of the rectangular lid, therefore:

    Perimeter = 2 * Length + 2 * Width

    Replacing with the values we have:

    56 = 2 * 13 + 2 * Width

    56 = 26 + 2Width

    2Width = 56 - 26

    2Width = 30

    Width = 30/2

    Width = 15

    The width of the rectangular lid is 15 cm.
  2. 21 January, 11:03
    0
    15 cm

    Step-by-step explanation:

    To solve this problem, you need to use the formula for the perimeter of a rectangle because perimeter is the measure of all of the sides in a shape. In this case, Jun wrapped 56 cm of ribbon around the perimeter of the rectangular lid.

    Substitute:

    P = 2l + 2w

    56 = 2 (13) + 2w

    Multiply:

    56 = 2 (13) + 2w

    56 = 26 + 2w

    Subtract 26 on both sides:

    56 = 26 + 2w

    -26 - 26

    30 = 2w

    Divide by 2 on both sides:

    30 = 2w

    /2 / 2

    15 = w
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