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18 September, 10:21

A square field has 5m added to its length and 2m added to its width. the field then had an area of 130cm^2. find the length of a side of the original field.

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  1. 18 September, 10:32
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    Let original length of the field be L.

    (L + 5) (L + 2) = 130

    L^2 + 7L + 10 = 130

    L^2 + 7L - 120 = 0

    (L - 8) (L + 15) = 0 Ignore the negative root (-15) so we have

    L = 8m Answer
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