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Railways R.R.C. (Patna) Solved Paper Held on 1st Shift 2-11-2014

  • question_answer
    A mixture of 40 litres of milk and water contains 10% water. How much water should be added to it so that water may be 20% in the new mixture?

    A) 2-5 litres           

    B) 5 litres

    C) 6 litres              

    D) 5-5 litres

    Correct Answer: B

    Solution :

    Water should be added \[=\frac{(20-10)}{(100-20)}\times 40\] \[=\frac{10}{80}\times 40\] \[=5\,\,litres\]


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