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Monday, 16 november 2009

Se cauta o concentratie de alcool de 30%

Proposed by GabiOffline
(10 comments)5.898 times displayed

Cati litri dintr-o solutie cu concentratie alcoolica de 20% trebuie adaugati in 40 de litri de solutie cu concentratie alcoolica de 50%, pentru a obtine o solutie cu concentratie alcoolica de fix 30% ?


Tags: Se, cauta, o, concentratie, de, alcool, de, 30%
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