Allied & ICAR Exam Bank • ALLIED_2149 NAT • 2 Marks

Section 8: General Aptitude

Quantitative Aptitude

Subtopic: Numerical Computation

Question Statement:

Two pipes X and Y can fill a tank in 24 minutes and 32 minutes respectively. Both pipes are opened together. After how many minutes should pipe Y be turned off so that the tank is completely full in 18 minutes?

Answer Key:

8

Step-by-Step Solution & Explanation

Work done by X in 18 min = $18/24 = 3/4$. Remaining work = $1/4$. Time for Y = $(1/4) / (1/32) = 8$ minutes.
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