A mixture of 70 litres of milk and water contains 10% water. How many litres of water should be added to the mixture so that the mixture contains 12 1/2% water?
Q1. A mixture of 70 litres of milk and water contains 10% water. How many litres of water should be added to the mixture so that the mixture contains 12 1/2% water?
Answer: 2 liters
Explanation: Milk = 63 L, water = 7 L; (7+x)/(70+x) = 1/8 → 56 + 8x = 70 + x → x = 2 litres.