SOLUTION: An auto mechanics has two bottles of battery acid solutions. One contains 10% acid and the other 4% acid. How many cubic centimeters of each solution must be used to make 120 cm�.

Question 354396: An auto mechanics has two bottles of battery acid solutions. One contains 10% acid and the other 4% acid. How many cubic centimeters of each solution must be used to make 120 cm�.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
It depends on what concentration you want.
Here's a similar problem.
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an alloy of metals is 25% copper. Another alloy is 50% copper. How much of each alloy should be used to make 1000 grams of an alloy that is 45% copper?
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t = amount of 25%
f = amount of 50%
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t + f = 1000
0.25t + 0.5f = 0.45*1000
Can you finish it?

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