Ten years ago, the sum of the ages of a father and his son was 34 years. If the ratio of their present ages is 7 : 2, what is the present age of the son?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 12 years
In ten years both have grown 10 years older, so the present sum is 20 years more; share it in the ratio 7 : 2.
Present sum \(=34+20=54\) years
Son \(\displaystyle =\frac{2}{9}\times54=12\) years