A 120-litre solution of salt and water contains 25% salt. If 30 litres of water are added, what is the new percentage of salt in the solution?
Show answer & explanation
Correct answer: A
Explanation
Given:
Total solution = 120 liters, Salt = 25%
30 liters of water was added.
According to the formula:
New percentage = (Salt / Total solution) × 100
Salt = 25% of 120 = 30 liters
New total solution = 120 + 30 = 150
New percentage = (30 / 150) × 100 = 20%