The ratio of Acid and Water in a mixture of 25 liters is 4 : 1. 3 liters water is added to the mixture. What will be the ratio of acid and water if further 9 liters of acid is also added?
Answer & explanation
Correct answer: option 3
Total mixture = 25 liters
Ratio of Acid : Water = 4 : 1
So,
- Acid $= \frac{4}{5} \times 25 = 20\text{ L}$
- Water $= \frac{1}{5} \times 25 = 5\text{ L}$
After adding 3 L water:
- Acid $= 20\text{ L}$
- Water $= 5 + 3 = 8\text{ L}$
Now add 9 L acid:
- Acid $= 20 + 9 = 29\text{ L}$
- Water $= 8\text{ L}$
Therefore, the new ratio of Acid : Water is: $29 : 8$