Multiple choice

The ratio between A’s and B’s age is 9: 13 respectively. 8 years ago the ratio between their ages was 7: 11 respectively. What is A’s present age? A और B की आयु के बीच अनुपात क्रमशः 9: 13 है। 8 वर्ष पूर्व उनकी आयु के बीच अनुपात क्रमशः 7: 11 था । A की वर्तमान आयु क्या है?

  1. 36

  2. 32

  3. 43

  4. 49
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A Correct answer
Explanation

Let A = 9x, B = 13x. Eight years ago: (9x-8)/(13x-8) = 7/11. Cross-multiply: 11(9x-8) = 7(13x-8). 99x - 88 = 91x - 56. 8x = 32, so x = 4. A's age = 9×4 = 36 years.

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