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    Question

    Milk costs Rs. 48 per litre. Water is free. In what

    ratio should water be mixed with milk so that the mixture can be sold at Rs. 48 per litre and still give 20% profit?
    A 2:1 Correct Answer Incorrect Answer
    B 4:3 Correct Answer Incorrect Answer
    C 5:1 Correct Answer Incorrect Answer
    D 9:8 Correct Answer Incorrect Answer

    Solution

    ATQ, Selling price of mixture = 48 For 20% profit: CP of mixture per litre = 48/1.2 = 40 Let milk : water = m : w Cost per litre of mixture = (48m + 0*w)/(m + w) = 40 48m = 40m + 40w 8m = 40w m/w = 5/1 So milk : water = 5 : 1 Asked water mixed with milk => water : milk = 1 : 5, but options are in milk:water form. Milk : Water = 5 : 1

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