Allied & ICAR Exam Bank • ALLIED_1354 MCQ • 1 Mark

Section 8: General Aptitude

Quantitative Aptitude

Subtopic: Numerical Computation

Question Statement:

Pipe A can fill an overhead water tank in 6 hours, while Pipe B can empty the full tank in 9 hours. If both pipes are opened simultaneously when the tank is empty, how many hours will it take to fill the tank completely?

Options:

  • (A) 18 hours
  • (B) 15 hours
  • (C) 12 hours
  • (D) 24 hours

Answer Key:

A

Step-by-Step Solution & Explanation

Net rate = $1/6 - 1/9 = 1/18$ tank/hr. Time = 18 hours.
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