Railways R.R.C. (Jabalpur) Solved Paper Held on 1st Shift 30-11-2014

  • question_answer A person's present age is two fifth of the age of his mother. After 8 years, he will be one half of the age of his mother. How old is the mother a present?

    A) 40 years           

    B) 32 years

    C) 36 years           

    D) 48 years

    Correct Answer: A

    Solution :

    Suppose the present age of his mother = x years Then, the present age of person \[\frac{2}{5}\,\,x\,\,years\] Now, after 8 years, \[\frac{2}{5}\,\,x+8=\frac{1}{2}\,\,(x+8)\] \[4x+80=5x+40\] \[x=40\,\,years\] Hence, the mother's present age = 40 years


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