A mixture contains milk and water in the ratio of 3:2. If 10 liters of water are added to the mixture, the ratio of milk to water becomes 1:1. What was the initial quantity of milk in the mixture?

✓ Correct Answer: Option B

Let initial milk be 3x and water be 2x. After adding 10 liters of water, milk remains 3x, and water becomes 2x+10. The new ratio is 3x / (2x+10) = 1/1. So, 3x = 2x+10, which means x=10. Initial milk = 3x = 3(10) = 30 liters.