Allied & ICAR Exam Bank • ALLIED_1930 MCQ • 2 Marks

Section 8: General Aptitude

Quantitative Aptitude

Subtopic: Ratios & Percentages

Question Statement:

How many liters of pure alcohol must be added to 40 liters of a 15% alcohol solution to make the strength 32%?

Options:

  • (A) 10 liters
  • (B) 8 liters
  • (C) 12 liters
  • (D) 15 liters

Answer Key:

A

Step-by-Step Solution & Explanation

Let $x$ liters be added. Initial alcohol $= 0.15 \times 40 = 6$ L. $(6 + x) / (40 + x) = 0.32 \implies 6 + x = 12.8 + 0.32x \implies 0.68x = 6.8 \implies x = 10$ liters.
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