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    Question

    A shopkeeper mixes two types of rice costing Rs 60 per

    kg and Rs 80 per kg in a ratio. He sells the mixture at Rs 85 per kg and gains a profit of 25%. If the total weight of the mixture is 80 kg, find the quantity of the cheaper rice used in the mixture (in kg).
    A 48 kg Correct Answer Incorrect Answer
    B 56 kg Correct Answer Incorrect Answer
    C 42 kg Correct Answer Incorrect Answer
    D 52 kg Correct Answer Incorrect Answer

    Solution

    Let the quantity of the cheaper rice (costing Rs 60 per kg) be x kg and the quantity of the costlier rice (costing Rs 80 per kg) be (80-x) kg. Total Cost price of the mixture = 60x + 80(80-x) = 6400 – 20x Total selling price of mixture = 80×85 = 6800 125% of cost price = 6800 Cost price = 6800/125 ×100 = 5440 6400 – 20x =5440 20x = 960 x = 48 quantity of the cheaper rice = x = 48 kg

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