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    Question

    A container contains 40 litres of milk. From this

    container, 4 litres of milk were taken out and replaced by water. This process was repeated further two times. How much milk is now contained by the container?
    A 31.5 liter Correct Answer Incorrect Answer
    B 32 liter Correct Answer Incorrect Answer
    C 29.16 liter Correct Answer Incorrect Answer
    D 28 liter Correct Answer Incorrect Answer

    Solution

    By using the above formula, the quantity of pure milk in the final mixture ⇒ 40 × [1 - (4/40)]3 ⇒ 40 × [1 - (1/10)]3 ⇒ 40 × (729/1000) = 29.16 ∴ The quantity of water in the final mixture is 29.16 litres.

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