The present age ratio of father and son is 7:2. After 15 years, the ratio becomes 2:1. What is the present age of the father?
A35 years
B42 years
C49 years
D56 years
Explanation
Let present ages be 7x and 2x. (7x + 15) / (2x + 15) = 2 / 1 => 7x + 15 = 4x + 30 => 3x = 15 => x = 5. Present age of father = 7 * 5 = 35 years.
Exam Relevance
- Topic: Averages
- Subtopic: Age Problems
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