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The present ages of Ritu and her aunt are in the ratio 4 : 7. In 9 years, the ratio will be 5 : 8. What is Ritu's present age, in years?

Competition practiceRatio, Proportion & Mixtures
  • A36
  • B63
  • C32
  • D45

Step-by-Step Solution

Let the ages be 4k and 7k. (4k + 9)/(7k + 9) = 5/8 gives 32k + 72 = 35k + 45, so k = 9. Ritu is 36.
Answer: A) 36

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