Allied & ICAR Exam Bank • ALLIED_2026 NAT • 1 Mark

Section 8: General Aptitude

Quantitative Aptitude

Subtopic: Numerical Computation

Question Statement:

A 60-liter solution contains 20% acid. The volume of pure water in liters that must be added to reduce the acid concentration to 15% is:

Answer Key:

20

Step-by-Step Solution & Explanation

Initial acid = $0.20 \times 60 = 12$ liters. If final volume is $V$, then $12 / V = 0.15 \implies V = 80$ liters. Water added = $80 - 60 = 20$ liters.
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