Предмет: Математика, автор: tora1995

Известно, что из 20т руды выплавляют 8т металла, содержащего 5% примесей. Найдите процент примесей в руде.

Ответы

Автор ответа: Kecikimba

0

20/8=2,5 раз руды больше чем металла
2,5•5%=12,5%

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