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the lenght of a rectangle is fixed at 19 cm. What width will make perimeter greater than 70 cm?

  • Algebra -

    The perimeter is two lengths + two widths, and that has to be more than 70.

    2L + 2W > 70

    We know that the length is 19, so 2L = 38.

    2W + 38 > 70

    2W > 70 - 38

    Now pick a width that makes that true. There are lots of them to choose from: a million will do. :-)

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