A rectangle field has an area of 300 square meters and a perimeter of 80 meters. What are the length and width of the field?

I really need help I don't know the answer.

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  1. Factors of 300 include 30 by 10.

    Would those dimensions give you a perimeter of 80?

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    Ms. Sue
  2. 2 L + 2 w = 80 or L + w = 40

    L w = 300 so w = 300/L


    L + 300/L = 40

    L^2 - 40 L + 300 = 0

    (L-30)(L-10) = 0
    L = 30 and w = 10

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