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The ratio of the present ages of A and B is 5 : 7. Four years hence, the ratio will become 3 : 4. Find the present age of B. (answer in years)

Competition practiceRatio, Proportion & Mixtures
  • A28
  • B32
  • C20
  • D24

Step-by-Step Solution

Let ages be and → → ; .
Answer: A) 28

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