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    Question

    How much water must be added to a cask which contain 32

    litre of milk at a cost price of Rs 45 per litre so that the cost of milk reduces to Rs. 40 per litre?
    A 1 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 3 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer

    Solution

    Let x litre water be added in the mixture. Then, (32+ x) 40 = 45 × 32 1280 + 40x = 1440 40x = 160 x = 4 Therefore, 4 litre water must be added in the mixture.

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