Multiple choice

The ratio of the ages of Sachin and Maneesh is 3 : 4. After five years the new ratio of their ages will be 4 : 5. What is the age of Maneesh at present?

  1. 15 years

  2. 20 years

  3. 18 years

  4. 24 years

  5. 30 years

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let present ages be 3x and 4x. After 5 years, the ratio becomes (3x+5)/(4x+5) = 4/5. Solving gives 5(3x+5) = 4(4x+5), which simplifies to 15x+25 = 16x+20, so x = 5. Maneesh's age = 4*5 = 20 years. The age difference (1x) remains constant over time.