एक पात्र में दूध और पानी का अनुपात 5:3 है, 10 लीटर दूध और 7 लीटर पानी मिलाया जाता है, अब दूध और पानी का अनुपात 8:5 है। मिश्रण में दूध की प्रारंभिक मात्रा ज्ञात कीजिए। 

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RRB PO Prelims Memory Based Paper (Held On: 4 August 2024 Shift 1)
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  1. 45
  2. 30
  3. 24
  4. 65
  5. 40

Answer (Detailed Solution Below)

Option 2 : 30
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गणना

प्रारंभिक अनुपात दूध : पानी = 5 : 3
माना, मात्रा = 8x ⇒ दूध = 5x, पानी = 3x

दूध की नई मात्रा = 5x + 10
पानी की नयी मात्रा = 3x + 7
नया अनुपात:
(5x + 10) / (3x + 7) = 8/5
25x + 50 = 24x + 56
x = 6
दूध = 5x = 30 लीटर

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