A mixture contains milk and water in the ratio 5 : 1. On adding 5 liters of water, the ratio becomes 5 : 2. The quantity of milk is:

दूध (5 भाग) स्थिर रहता है। पानी में परिवर्तन = 2 - 1 = 1 भाग। 1 भाग = 5 लीटर। दूध = 5 भाग = 25 लीटर।