Multiple choice

The ratio between ages of Sulekha and Anju is 9:8 .After 5 years, the ratio of their ages will be 10 : 9 .What is the difference of their ages?

  1. 4 years

  2. 5 years

  3. 6 years

  4. 7 years

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let ages be 9x and 8x. After 5 years: (9x+5)/(8x+5) = 10/9 → 9(9x+5) = 10(8x+5) → 81x + 45 = 80x + 50 → x = 5. Present ages: 45 and 40, difference = 5 years. Age difference never changes.

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