A 40-litre mixture contains milk and water in the ratio 3 : 1. How much water must be added to make the ratio 3 : 2?
A. 12 litres
B. 5 litres
C. 10 litres
D. 8 litres
A. 12 litres
B. 5 litres
C. 10 litres
D. 8 litres
Best answer
Answer: C. 10 litres
Answer: (C) 10 litres
Milk = 30 L, water = 10 L. Milk does not change, so for 3 : 2 water must be 30 × \(\frac{2}{3}\) = 20 L.
Water to add = 20 − 10 = 10 L.
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