Surfing For How Many Liters Of A 30 Alcohol Solution?

Ruth asks…How many liters of pure alcohol must be added to 15 liters of a 20% solution to obtain a mixture which is 30%?How many liters of pure alcohol must be added to 15 liters of a 20% solution to obtain a mixture which is 30% alcohol? can u show me the solution?=)Nancy answers:2.1Lizzie asks…How many Liters (L) of a 40% alcohol solution must be mixed with 30 L of a 70% solution to get a 60% solution?How many Liters (L) of a 40% alcohol solution must be mixed with 30 L of a 70% solution

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