Quantity I: A vessel contains a mixture of milk and water in the ratio of 7 : 5. If 9 litre of mixture is sold and replaced by same amount of water then the new mixture contain milk and water in the ratio 7 : 9. Find initial amount of water?
Quantity II: A vessel is full of 63 litre of milk. If 9 litre of milk is taken out and replace by water. Further 7 litre of mixture is taken out and replace again with water then find the amount of water at the end?
\Quantity II: Final Quantity = 63 (1-9/63) (1-7/63) = 63 × 6/7 × 8/9 = 48 litre Water = 63 - 48 = 15 litre. Hence, Quantity I = Quantity II
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