SOLUTION: Manha wants to make a 36 percent acid solution. She has already 3 leters of a 72 percent acid solution. How many litres of a 9 percent acid solution must she add.

Question 993897: Manha wants to make a 36 percent acid solution. She has already 3 leters of a 72 percent acid solution. How many litres of a 9 percent acid solution must she add.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
= liters of acid in 72% solution
Let = liters of 9% solution needed
= liters of acid in 9% solution
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4 liters of 9% solution are needed
check:

OK
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