If the ratio of the ages of two persons is 3:4 and after 10 years it becomes 4:5, what are their current ages?
Q1. If the ratio of the ages of two persons is 3:4 and after 10 years it becomes 4:5, what are their current ages?
Answer: 15, 20
Explanation: Let's denote their ages as 3x and 4x. After 10 years, their ages will be 3x + 10 and 4x + 10. So, (3x + 10) / (4x + 10) = 4 / 5. Cross-multiplying, 5(3x + 10) = 4(4x + 10).