15 litres of a mixture contains 20% alcohol and the rest water. If 3 litres of water be mixed in it. The percentage of alcohol in the new mixture will be?
Correct Answer: 162/ 3
Explanation:
Alcohol = (20/100) x 15 litres = 3 litres,
Water = 12 litres
New mix, contains,
Alcohol = 3 litres,
Water = 15 litres ∴ Percentage of alcohol in new mix. = (3/18) x 100 % = 162/ 3%
