A mixture of 70 liters of wine and water contains 10% water. How much water must be added to make water 12 ½% of the total mixture?
Q1. A mixture of 70 liters of wine and water contains 10% water. How much water must be added to make water 12 ½% of the total mixture?
Answer: 2 liters
Explanation: Initial water = 10% of 70 = 7 L. Adding x litres of water: (7+x)/(70+x) = 12.5% = 1/8, solving gives x = 2 litres.