Engineering Board Exam Reviewer · Mixture Problems · easy
For a particular experiment, you need 5 liters of 10% solution. You find 7% and 12% solution on the shelf. How much of the 7% solution should you mix with the appropriate amount of the 12% solution to get 5 liters of 10% solution?
- 1.5
- 2.5
- 2
- 3
Answer
C. 2
Solution
Let x=volume of 7% solution, (5-x)=volume of 12%. 0.07x+0.12(5-x)=0.5 gives x=2 liters.
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