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Картинка имеет форму прямоугольника со сторонами 12 см и 32 см. Её наклеили на белую бумагу так, что вокруг картинки получилась белая окантовка одинаковой ширины. Площадь, которую занимает картинка с окантовкой, равна 684 см^2. Какова ширина окантовки? Ответ дайте в сантиметрах.
желательно полное решение и правильное.
дам 20 баллов.
Ответы 1
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12*32=384см^2 площа картинки684-384=300 см^2 площа обкантовки
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Автор:
booker20 - 6 лет назад
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