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8 litres are drawn from a flask containing milk and then filledwith water. The operation is performed 3 more times. Theratio of the quantity of milk left and total solution is 81/625.How much milk the flask initially holds?

Correct Answer: 20 ltr

Explanation:

Let initial quantity be Q, and final quantity be F


F = Q(1 - 8/Q) 4


=> Q = 20


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