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Kiran's age and his elder sister's age are now in the ratio 2 : 3. In 10 years the ratio will become 3 : 4. What is Kiran's present age? (in years)

Competition practiceRatio, Proportion & Mixtures
  • A20
  • B30
  • C24
  • D15

Step-by-Step Solution

Let ages be 2k and 3k. (2k + 10)/(3k + 10) = 3/4 → 8k + 40 = 9k + 30 → k = 10. Kiran = 20 years.
Answer: A) 20

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