October 2021 0 27 Report
СРОЧНо!!! из двух металлов с плотностями p1= 3000 кг/м3 и p2=2500 кг/м3 изготовили сплав массой 15 кг. Плотность сплава оказалось равной p=2750кг/м3. Каковы массы металлов в сплаве ?
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