25 litres of a mixture contains 30% of spirit and rest water. If 5 litres of water be mixed in it, the percentage of spirit in the new mixture is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e 25%
The 1L of the mixture contains 0.3L spirit
⇒ The 25L of mixture contains = 25 × 0.3 = 7.5L
The quantity of water in the mixture = 25 - 7.5 = 17.5L
We have added 5L of water in the given mixture, the quantity of the mixture = 17.5 + 5 = 22.5
⇒ The percentage of spirit in the mixture = (7.5 / 30) × 100
⇒ 25%