दो लड़कों की आयु का अनुपात 5 : 6 है। दो वर्ष बाद अनुपात 7 : 8 हो जाएगा। 10 वर्ष बाद उनकी आयु का अनुपात होगा:

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Chandigarh Police Constable 2013 Official Paper
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  1. 15 : 16
  2. 17 : 18
  3. 11 : 12
  4. 22 : 24

Answer (Detailed Solution Below)

Option 1 : 15 : 16
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दिया गया है:

वर्तमान आयु अनुपात = 5:6

2 वर्ष बाद अनुपात = 7:8

गणना

मान लीजिए वर्तमान आयु 5x और 6x है

फिर, 2 वर्ष बाद: (5x + 2)/(6x + 2) = 7/8

x ज्ञात करें, फिर 10 वर्ष बाद आयु की गणना करें और अनुपात ज्ञात करें

⇒ (5x + 2)/(6x + 2) = 7/8

⇒ 8(5x + 2) = 7(6x + 2)

⇒ 40x + 16 = 42x + 14

⇒ 2x = 2

⇒ x = 1

वर्तमान आयु = 5x = 5, 6x = 6

10 वर्ष बाद = 5 + 10 = 15, 6 + 10 = 16

∴ 10 वर्ष बाद उनकी आयु का अनुपात 15:16 होगा।

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