SOLUTION: Using a 30% window cleaner solution, and a 60% window cleaner solution, how many liters of each will be needed to create 80L of 45% window cleaner solution?

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Question 200464: Using a 30% window cleaner solution, and a 60% window cleaner solution, how many liters of each will be needed to create 80L of 45% window cleaner solution?
Answer by Alan3354(69443) About Me  (Show Source):
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Using a 30% window cleaner solution, and a 60% window cleaner solution, how many liters of each will be needed to create 80L of 45% window cleaner solution?
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Since 45% is in the center of 30 and 60, it's 40 liters of each.