A 60-litre mixture contains milk and water in the ratio 7 : 3. How much water must be added to make the ratio 7 : 5?
A. 15 litres
B. 10 litres
C. 8 litres
D. 12 litres
A. 15 litres
B. 10 litres
C. 8 litres
D. 12 litres
Best answer
Answer: D. 12 litres
Answer: (D) 12 litres
Milk = 42 L, water = 18 L. For 7 : 5 with 42 L milk, water must be \(42 \times \frac{5}{7} = 30\) L.
Water to add = 30 − 18 = 12 L.
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