One litre of water is added to 5 litres of alcohol-water solution having 40% alcohol strength. The strength of alcohol in the new solution will be:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → \(33\frac{1}{3}\)%
Adding water does not change the amount of alcohol; it only increases the total volume, so the strength is the same alcohol over the larger total.
Alcohol in the solution \(=40\%\) of 5 L \(=2\) L
New volume \(=5+1=6\) L
Strength \(\displaystyle =\frac{2}{6}\times100=33\frac{1}{3}\%\)