Multiple choice

The ratio between the ages of A and his father is 1 : 7. The difference between their ages is 30 years. What would be the ratio of their ages 10 years later?

  1. 9 : 33

  2. 4 : 13

  3. 3 : 1

  4. 1 : 3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let ages be x and 7x. Difference 6x = 30, so x = 5. Current ages are 5 and 35. 10 years later, ages are 15 and 45. Ratio = 15/45 = 1/3.

AI explanation

Let the ages of A and his father be x and 7x. The difference in their ages is 7x - x = 6x, which equals 30, so x = 5. Their present ages are 5 and 35. After 10 years, their ages will be 15 and 45, and the ratio 15 : 45 simplifies to 1 : 3.

Keep practicing — related questions