SOLUTION: David adds 300 mL of water to 450 mL of 60% alcohol solution so as to dilute its concentration to 40%. Does he add too much water to the solution?

Question 1103983: David adds 300 mL of water to 450 mL of 60% alcohol solution so as to dilute its concentration to 40%. Does he add too much water to the solution?
Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
David adds 300 mL of water to 450 mL of 60% alcohol solution so as to dilute its concentration to 40%. Does he add too much water to the solution?
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450*60 + 300*0 = C*750
C = 36%

Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
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David adds 300 mL of water to 450 mL of 60% alcohol solution so as to dilute its concentration to ....
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36% alcohol solution result.
Did he add too much water? YES, because he wanted "40%" alcohol.
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