Laboratory

In a laboratory, twelve litres of 80% alcohol were to be diluted to produce 40% alcohol, and then further combined to make a final 70% alcohol solution. A five-litre barrel of 40% alcohol was available. How much of the 40% alcohol will remain in the barrel?

Your answer:

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algebrabasic operations and conceptsUnits of physical quantitiesthemes, topicsGrade of the word problem

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