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Two pipes, A and B, can fill a tank in 12 and 18 hours respectively. Pipe C can empty it in 9 hours. If all three are opened simultaneously, how long will it take to fill the tank?
This question appeared in the OPSC Prelims 2025 examination (GS-II). It is Question 78 out of 178 questions in this paper.
This question was part of the OPSC Prelims 2025 (GS-II). The OPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all OPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.