80% and 90% pure acid solutions are mixed to obtain 20liters of 87% pure acid solutions. Find the quality (in liters) of 80% pure acid solution taken to form the mixture.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 6
Concept used:
Alligation method
Calculations:
Quantity of 80% pure acid = 20 × (3/10) = 6 liters