In a mixture of 60 liters, the ratio of milk and water is 2:1. How much water should be added to make the ratio 1:2?

प्रारंभिक: दूध=40L, पानी=20L। नया अनुपात 1:2 का अर्थ है 40 / (20 + x) = 1/2। 80 = 20 + x => x = 60 लीटर।