Предмет: Алгебра, автор: МарияЛаренсс

В сплаве 4 кг меди и 6 кг алюминия. Сколько процентов меди в сплаве?
1) 4%; 2) 6%; 3) 40%; 4) 60%.

Ответы

Автор ответа: заяяяц

0

10 кг=100%
4 кг=х
х=4*100/10=40
ответ 40%

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