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    Question

    How much water is to be added to 75 ml of alcohol, so

    that the mixture contains 20% of alcohol?
    A 100 ml Correct Answer Incorrect Answer
    B 225 ml Correct Answer Incorrect Answer
    C 250 ml Correct Answer Incorrect Answer
    D 125 ml Correct Answer Incorrect Answer

    Solution

    ATQ,

    Pure alcohol = 75 ml Final solution should be 25% alcohol Need to find: How much water to add Let water added = x ml So, total solution = 75 + x ml We want alcohol to be 25% of the total solution: On Solving the equation:

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