Предмет: Алгебра, автор: dashasummer

Смешали 2 литра молока жирностью 6% и 3 литра молока жирностью 8%. Какова будет жирность смеси?

Ответы

Автор ответа: helenaal

1. В 2л молока жирностью 6% жира (2х6)/100, в 3 л 8% (3х8)/100,
2. В 5л молока жира (12)/100 +(24)/100=36/100,
3. В каждом из 5л жира (36/500)=7,2/100, т.е 7,2%

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