A 40-litre mixture contains 25% alcohol and 75% water. If 10 litres of water are added to the mixture, the percentage of alcohol in the new mixture is:
This questions was previously asked in
ssc cgl 2023 pre
Explanation:
- The initial mixture contains 40 litres with 25% alcohol.
- This means there are 10 litres of alcohol (25% of 40 litres).
- 10 litres of water are added, making the total volume 50 litres.
- The amount of alcohol stays at 10 litres.
- To find the new alcohol percentage: (10 litres of alcohol / 50 litres of total mixture) * 100 = 20%.
- Option 1: 27% - This is not correct as the alcohol percentage is lower.
- Option 2: 18% - This is incorrect based on calculations.
- Option 3: 20% - This is the correct alcohol percentage.
- Option 4: 25% - Incorrect as the percentage decreases with more water.
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By: Parvesh Mehta