Arithmetichard · Past Paper
A mixture contains alcohol and water in the ratio 4:3. If 5 liters of water is added, the ratio becomes 4:5. Find the quantity of alcohol in the mixture.
A10 L
B15 L
C12 L
D18 L
✓ Correct Answer: A — 10 L
Alcohol = 4x, Water = 3x. 4x/(3x+5) = 4/5 => 20x = 12x+20 => 8x = 20 => x=2.5. Alcohol = 4 * 2.5 = 10 L.
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