Multiple choice

1 lit of water is added to 5 lit of alcohol and water solution containing 40% alcohol strength, the strength of alcohol in the new solution will be

  1. 30%

  2. 33 1/3%

  3. 33 2/3%

  4. 33%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Initial alcohol = 40% of 5 = 2 liters. Total volume becomes 5 + 1 = 6 liters. New concentration = 2 / 6 = 1/3 = 33.33% or 33 1/3%.

AI explanation

The initial 5 litre solution contains 40 percent alcohol, meaning there are 2 litres of pure alcohol. When 1 litre of water is added, the total volume of the new solution becomes 6 litres, but the amount of alcohol remains 2 litres. The new strength of the alcohol is calculated by dividing 2 litres by 6 litres, which equals 1/3 or 33 1/3 percent.

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