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Railways PYQCBT 1 2016

RRB NTPC · Question 85

The ratio of the present ages of X and Y is 2 : 1. After 14 years their age ratio will be 29 : 18. What is the difference between the present age of the two? A. 22 years B. 11 years C. 9 years D. 13 years

  1. C

  2. A

  3. D

  4. B

Show answer & explanation

Answer: (B) A

Explanation

Let Y = x and X = 2x. (2x + 14)/(x + 14) = 29/18 gives 36x + 252 = 29x + 406, so x = 22. The difference of their ages = 2x − x = 22 years.