Smile 發問時間: 科學及數學數學 · 2 個月前

Maths problem: How to do, thanks?

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1 個解答

評分
  • SC147
    Lv 6
    2 個月前
    最佳解答

    Let length of rectangle = y cm

    => its width = 18-y

    new length = 1.4y

    new width = 0.5(18-y)

    1.4y - 0.5(18-y) = 10

    1.9y = 19

    ∴ y = 10 cm

    So, original length = 10 cm

    & original width = 0.5(18-10) = 4 cm

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