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    Question

    Milk and water are in the ratio 1:2. When 1 litre of milk

    and 1 litre of water are added, the ratio becomes 3:5. Find the initial quantity of the mixture.
    A 4 litres Correct Answer Incorrect Answer
    B 1 litres Correct Answer Incorrect Answer
    C 6 litres Correct Answer Incorrect Answer
    D 11 litres Correct Answer Incorrect Answer
    E 16 litres Correct Answer Incorrect Answer

    Solution

    Let the initial quantity of milk and water be 'y' and '2y' litres respectively.
    So, (y + 1):(2y + 1) = 3:5
    Or, 5 × (y + 1) = 3 × (2y + 1)
    Or, 5y + 5 = 6y + 3
    Or, y = 2
    Therefore, required quantity = 3y = 3 × 2 = 6 litres

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