A 250 litres mixture contains milk and water in the ratio 4:1 respectively. If 20% of the mixture is replaced with the same quantity of water, then find the quantity of water in the new mixture.
Quantity of water in the mixture initially = 250 × (1/5) = 50 litres Quantity of water removed = 50 × 0.2 = 10 litres Quantity of water added = 250 × 0.2 = 50 litres Quantity of water in the new mixture = 50 – 10 + 50 = 90 litres
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