பால்-தண்ணீர் கலவையில் 2/3 பால் இருந்தது. 21 லிட்டர் கலவை இருந்தது. அதில் 4 லிட்டர் தண்ணீரைச் சேர்த்தால் கிடைக்கப்பெறும், புதிய கலவையில் பாலின் சதவீதத்தைக் கண்டறியவும்.

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RRB ALP Previous Paper 2 (Held On: 9 Aug 2018 Shift 2)
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  1. 44
  2. 56
  3. 14
  4. 11

Answer (Detailed Solution Below)

Option 2 : 56
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மொத்த அளவு = 21 லிட்டர்

பால்-தண்ணீர் கலவையில் 2/3 பால்,

⇒ பாலின் அளவு = 2/3 × 21 = 14 லிட்டர்

⇒ நீரின் அளவு = 21 – 14 = 7 லிட்டர்

அதில் 4 லிட்டர் தண்ணீர் சேர்க்கப்படுகிறது.

⇒ புதிய நீர் அளவு = 7 + 4 = 11 லிட்டர்.

⇒ கலவையின் மொத்த அளவு = 14 + 11 = 25

∴ பால் சதவீதம் = 14/25 × 100 = 56%
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