Question

    Quantity of water in a 300 litres mixture (alcohol +

    water) is 40 litres less than the quantity of alcohol in it. Find the quantity of water to be mixed so that the quantity of alcohol in the mixture becomes 50% of the whole mixture.
    A 60 litres Correct Answer Incorrect Answer
    B 20 litres Correct Answer Incorrect Answer
    C 40 litres Correct Answer Incorrect Answer
    D 80 litres Correct Answer Incorrect Answer

    Solution

    Quantity of water in the mixture = (300 – 40)/2 = 130 litres So, Quantity of alcohol in the mixture = (300 – 130) = 170 litres Total quantity of the mixture = 170 x (100/50) = 340 litres Therefore, quantity of water to be mixed = 340 – 300 = 40 litres

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