In a mix 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 = 40, पानी = 20। माना मिलाया गया पानी x है। 40 / (20 + x) = 1/2 => 80 = 20 + x => x = 60 लीटर।