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Engineering Exams RRB-JE JE (Junior Engineer) DMS (Depot Material Superintendent) CS (Chemical Supervisor - Research) MS (Metallurgical Supervisor - Research) Mathematics 2019 24-May-2019 Paper-1 Shift-2 Easy +1 -0.33 CMA (Chemical and Metallurgical Assistant)
Difference of ages of father and son is 24 years. Two years back age of father was twice the son's present age. What is father's age now?
Correct Answer: B. 46
Explanation: To find the father's current age, we can set up two equations based on the information provided. Let F represent the father's current age and S represent the son's current age. The first piece of information states that the difference in their ages is 24 years, which gives us the equation: F - S = 24. From this, we can express the son's age as S = F - 24. The second piece of information states that two years ago, the father's age was twice the son's current age. This can be written as: F - 2 = 2S. By substituting the first equation into the second, we get: F - 2 = 2(F - 24). Expanding this gives F - 2 = 2F - 48. Rearranging the terms to solve for F, we subtract F from both sides and add 48 to both sides, resulting in F = 46. Therefore, the father's current age is 46 years.
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