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8. Сплав содержит 30% золота, 20% серебра, а остальное - платина. Сколько
килограмм платины содержится в сплаве массой 4 килограмма?-
Предмет:
Математика -
Автор:
backbone - 5 лет назад
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Ответы 1
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100-30-20=50 % содержание платины4кг сплава-100%хкг платины -50% х= 4:100*50=0,04*50=2 кг платины в 4 кг сплаве
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Автор:
abel390 - 5 лет назад
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по тексту
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