A 160-litre mixture contains milk and water in the ratio 7 : 3. How many litres of water must be added to make the ratio 2 : 1?

💡 Solution & Explanation

Milk = 160 × 7/10 = 112 litres and water = 48 litres. Adding water does not change the milk. For milk : water = 2 : 1, the water must be 112 × 1/2 = 56 litres. So add 56 − 48 = 8 litres of water.