The sum of the present ages of a father and his son is 100 years. Five years ago, their ages were in the ratio 2 : 1. What will be the ratio of the father’s age to the son’s age after 10 years?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 5 : 3
Five years ago both were 5 years younger, so their sum was 10 years less; share it in the ratio 2 : 1.
Sum five years ago \(=100-10=90\) years
Then: father \(=60\), son \(=30\) years
Now: father \(=65\), son \(=35\) years
After 10 years: \(75:45=5:3\)