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    Question

    Quantity of water in a 280 litres mixture (Milk + Water)

    is 40 litres less than the quantity of milk in it. Find the quantity of water to be mixed so that the quantity of milk in the mixture becomes 40% of the whole mixture.
    A 60 litres Correct Answer Incorrect Answer
    B 120 litres Correct Answer Incorrect Answer
    C 140 litres Correct Answer Incorrect Answer
    D 160 litres Correct Answer Incorrect Answer

    Solution

    Quantity of water in the mixture = {(280 - 40)/2} = 120 litres

    So, quantity of milk in the mixture = (280 - 120) = 160 litres

    Total quantity of the mixture if quantity of milk in the mixture becomes 40% = 160 × (100/40) = 400

    So, quantity of water needs to be mixed = (400 - 280) = 120 litres

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