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    Question

    6 liters of milk are removed from a can full of milk and

    replaced with water. This process is repeated three more times. The ratio of the remaining milk to the amount of water in the can is now 81:175. What was the original amount of milk in the can?
    A 24 liters Correct Answer Incorrect Answer
    B 12 liters Correct Answer Incorrect Answer
    C 10 liters Correct Answer Incorrect Answer
    D 14 liters Correct Answer Incorrect Answer

    Solution

    Original quantity of milk = x liters Quantity of milk left in can after 4 operations = [x * (1 тАУ 6/x)4] =>[x * (1 тАУ 6/x)4]/x = 81/256 => x = 24 liters

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