The ages of a retired officer and his son are in the ratio 7:2. If their combined age is 54 years, how old is the son?
Q1. The ages of a retired officer and his son are in the ratio 7:2. If their combined age is 54 years, how old is the son?
Answer: 12 years
Explanation: The ratio 7:2 has 9 parts in total. Each part is 54 divided by 9, which is 6, so the son is 2 times 6, or 12 years.