Q. The ratio of two numbers is 4 : 9. If 15 is added to each number, the ratio becomes 7 : 12. The smaller number is
✅ Correct Answer: (A)
20
Explanation: Let the numbers be 4x and 9x. (4x + 15)/(9x + 15) = 7/12. Solving gives x = 5. Smaller number = 4 × 5 = 20.
Explanation by: Roshan
Let the numbers be 4x and 9x. (4x + 15)/(9x + 15) = 7/12. Solving gives x = 5. Smaller number = 4 × 5 = 20.