Alcohol Solution Replacement
XAT 2012 · Quantitative Ability & Data Interpretation · Easy · Mixtures and Alligations
Ram prepares solutions of alcohol in water according to customers' needs. This morning Ram has prepared 27 litres of a 12% alcohol solution and kept it ready in a 27 litre delivery container to be shipped to the customer. Just before delivery, he finds out that the customer had asked for 27 litres of 21% alcohol solution. To prepare what the customer wants, Ram replaces a portion of 12% solution by 39% solution. How many litres of 12% solution are replaced?
- A.
5
- B.
9
- C.
10
- D.
12
- E.
15
B
Explanation
Using alligation ratio of 12% solution and 39% solution to get 21% solution: . So 39% solution needed = litres.
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