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
Alcohol strength is 40% in alcohol water mixture .
So, Amonut of alcohol = \(\frac{40}{100}\) x 5 = 2 litre
Amount of water in mixture = 5 - 2 = 3 litre
Now, One litre of water is added to 5 litres of alcohol-water solution
New amount of water in mixture = 3 + 1 = 4 litre
Total amount of mixture = 5 + 1 = 6 litre
New strength of alcohol = \(\frac{2}{6}\) x 100
= 33\(\frac{1}{3}\)%