Arithmeticmedium · Past Paper
A mixture of 40 liters of milk and water contains 10% water. How much water should be added to make it 20% water in the new mixture?
A4 liters
B5 liters
C8 liters
D10 liters
✓ Correct Answer: B — 5 liters
Original water = 4L. Milk = 36L. In new mixture, 80% is milk (36L). 100% = 36/0.8 = 45L. Added water = 45 - 40 = 5L.
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