Explanation:

- Start with a mixture of 48 liters of water and 40 liters of juice.

- Total mixture = 48 + 40 = 88 liters.

- 50% of mixture is taken out, which means 44 liters (24 liters water + 20 liters juice) is removed.

- Remaining mixture: 24 liters of water and 20 liters of juice.

- Let 'a' liters of juice be added, making it: Water = 24 liters, Juice = 20 + a liters.

- The given ratio of water to juice becomes 4:5.

- Set up the equation: 24 / (20 + a) = 4/5.

- Solve to find 'a': 24 * 5 = 4 * (20 + a), leading to 120 = 80 + 4a.

- Simplify to find a = 10 liters.

- Correct Answer: 10 liters (Option 1)