10 litres of water were drawn from a cask full of water and it was filled with 30 litres milk then the concentration of milk in the mixture become 20%. Quantity I :Again, how many litres of mixture should be replaced with 10 litres milk so the concentration of water in the mixture will become 60%. Quantity II :What was the original quantity of water in the cask?

• A. Quantity : I > Quantity : II
• B. Quantity : I ≥ Quantity : II
• C. Quantity : I < Quantity : II
• D. Quantity : II ≥ Quantity : I
• E. Quantity I = Quantity II or relation can't be established