SOLUTION: How many liters of pure alcohol must be added to 10 liters of a 70% solution to obtain a 90% solution?
I know the answer is 20 liters, but I need help with the equation I would us
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Question 585850: How many liters of pure alcohol must be added to 10 liters of a 70% solution to obtain a 90% solution?
I know the answer is 20 liters, but I need help with the equation I would use to figure this out on my own please.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = liters of pure alcohol to be added
liters of alcohol in 70% solution
In words:
( liters of alcohol you end up with ) / ( total liters of solution ) = 90%
20 liters of pure alcohol must be added
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