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Multiple choice

The ratio of the ages of A and B is (4 : 5) and after 5 years the ratio will be (5 : 6). A's present age is -

  1. 10 years

  2. 20 years

  3. 25 years

  4. 40 years

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let ages be 4x and 5x. After 5 years: (4x+5)/(5x+5) = 5/6. Cross-multiply: 24x + 30 = 25x + 25, giving x = 5. A's present age = 4x = 20 years.

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