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ATQ,
Let the initial quantity of milk be ‘M’ litres. We use the formula: Milk left = M × {(M - 10)/M}² 64 = M × {(M - 10)/M}² 64M = (M – 10)² 64M = M² – 20M + 100 M² – 84M + 100 = 0 M² – 80M – 4M + 100 = 0 M(M – 80) – 4(M – 80) = 0 (M – 4)(M – 80) = 0 M = 80, 4 Since, quantity of milk left in the container is 48 litres. So, initial quantity of milk cannot be 4 litres. So, initial quantity = 80 litres
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