Multiple choice

Present age of A and B are in the ratio of 4: 5 respectively. Five years hence the ratio of their age becomes 5: 6 respectively. What is A's present age? A और B की वर्तमान आयु में अनुपात क्रमशः 4 : 5 है। पांच वर्ष बाद उनकी आयु का अनुपात क्रमशः 5 : 6 हो जाता है। A की वर्तमान आयु क्या है?

  1. 25 years/ वर्ष

  2. 22 years/ वर्ष

  3. 20 years/ वर्ष

  4. 30 years/ वर्ष
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let A's present age = 4x, B's present age = 5x. After 5 years: (4x+5)/(5x+5) = 5/6. Cross-multiply: 6(4x+5) = 5(5x+5), which gives 24x+30 = 25x+25, so x = 5. A's present age = 4x = 4×5 = 20 years. Option C is correct.

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