Multiple choice

The ages of Jai and Veeru are in the ratio of 5:6 respectively.After 8 years the ratio of their ages will be 7:8.What is the difference in their ages? जय और वीरू की आयु का अनुपात क्रमशः 5 : 6 है। 8 वर्ष बाद उनकी आयु का अनुपात 7 : 8 होगा। उनकी आयु का अन्तर क्या है?

  1. 4 years/वर्ष

  2. 8 years/वर्ष

  3. 10 years/वर्ष

  4. 12 years/वर्ष

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A Correct answer
Explanation

Let present ages be 5x and 6x. After 8 years: (5x+8)/(6x+8) = 7/8. Cross-multiplying: 40x+64 = 42x+56, so 2x=8 and x=4. The difference is 6x-5x = x = 4 years. The age difference is constant and doesn't change with time.