ISEE Mathematics Achievement Question 82: Answer and Explanation
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Question: 82
12. A mixture contains 20 gallons of water and 5 gallons of nitric acid. If 10 more gallons of water are added, the part that is water is
- A.
- B.
- C.
- D.
Correct Answer: D
Explanation:
The correct answer is (D). Ten more gallons of water would bring the volume of the mixture to 30 gallons of water + 5 gallons of acid = 35 gallons. The part that is water is 
, or 
.