एक आदमी और उसकी पत्नी की वर्तमान आयु का अनुपात 5 : 8 है। 10 वर्ष बाद, आदमी और उसकी पत्नी का अनुपात 2 : 3 होगा। 20 वर्ष बाद उनकी आयु का अनुपात क्या होगा?

  1. 9 : 10
  2. 3 : 5
  3. 4 : 5
  4. 7 : 10
  5. 3 : 7

Answer (Detailed Solution Below)

Option 4 : 7 : 10
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IBPS RRB Clerk Reasoning (Mock Test)
20 Qs. 20 Marks 11 Mins

Detailed Solution

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मान लीजिए आदमी और उसकी पत्नी की आयु क्रमशः 5x और 8x है।

10 वर्ष बाद, आदमी और उसकी पत्नी का अनुपात 2 : 3 होगा;

⇒ (5x + 10) / (8x + 10) = 2 : 3

अतः, x = 10

आदमी और उसकी पत्नी की आयु क्रमशः 50 और 80 है।

∴ 20 वर्षों के बाद उनकी आयु का अनुपात 70 : 100 = 7 : 10 है।

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