Multiple choice

Munna is 27 years old and Bablu is 29 years old. After how many years will the ratio of their ages be 19:20?

  1. 11 years

  2. 3 years

  3. 7 years

  4. 12 years
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A Correct answer
Explanation

Let x be the number of years. (27+x)/(29+x) = 19/20. Cross-multiply: 20(27+x) = 19(29+x) => 540 + 20x = 551 + 19x => x = 11.

AI explanation

Let x be the number of years after which their age ratio becomes 19 to 20. The ratio equation is (27 + x) divided by (29 + x) equals 19 divided by 20. Cross-multiplying yields 540 plus 20x equals 551 plus 19x. Solving for x gives x equals 11, so the ratio will be 19 to 20 after 11 years.

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