Allied & ICAR Exam Bank • ALLIED_1672 MCQ • 2 Marks

Section 8: General Aptitude

Quantitative Aptitude

Subtopic: Numerical Computation

Question Statement:

A cistern normally fills in 8 hours, but due to a leak at the bottom, it takes 2 additional hours to fill. When the cistern is full, how long will the leak take to empty it completely?

Options:

  • (A) 40 hours
  • (B) 36 hours
  • (C) 32 hours
  • (D) 48 hours

Answer Key:

A

Step-by-Step Solution & Explanation

Inlet rate = $1/8$. Combined rate = $1/10$. Leak rate = $1/8 - 1/10 = 1/40$. Emptying time = 40 hours.
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