Mixtures & Alligation · Question 14 · Hard
Mixtures & Alligation question 14
A can holds 50 litres of pure milk. 5 litres are removed and replaced with water, and this is repeated two more times. What is the final ratio of milk to water?
- 81 : 19
- 729 : 271
- 27 : 23
- 7 : 3
Answer and explanation
Answer: B. 729 : 271
Explanation: Milk left = 50 × (9/10)^3 = 36.45 L and water = 13.55 L. Ratio = 36.45 : 13.55 = 729 : 271.
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