Ratio & Proportion · Question 10 · Medium
40 litres of a mixture contains milk and water in the ratio 7 : 3. How much water must be added to make the ratio 7 : 5?
- 8 litres
- 6 litres
- 10 litres
- 12 litres
Answer and explanation
Answer: A. 8 litres
Explanation: Milk = 28 L and water = 12 L. For 7 : 5, water must be 28 × 5/7 = 20 L, so add 20 − 12 = 8 litres.
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