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      Question

      The ratio of present ages of A and B is 4 : 5. After 6

      years, the ratio becomes 5 : 6. Find B’s present age.
      A 25 yrs Correct Answer Incorrect Answer
      B 30 yrs Correct Answer Incorrect Answer
      C 42 yrs Correct Answer Incorrect Answer
      D 55 yrs Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, Let present ages be 4x and 5x After 6 years: (4x + 6)/(5x + 6) = 5/6 6(4x + 6) = 5(5x + 6) 24x + 36 = 25x + 30 x = 6 B’s age = 5x = 30 years

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