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math-word problem

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The width of a rectangle is fixed at 21cm. What lengths will make the perimeter greater than 80cm.

Please help with this word problem I do not even know where to begin.

  • math-word problem -

    The perimeter is the distance around the rectangle.

    P = 2L + 2W

    Two widths = 42 cm.

    80 - 42 = 38

    38/2 = 19

    The length must be over 19 cm.

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