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A large cistern is being filled by two inlet pipes, P and Q, and emptied by an outlet pipe R. Pipe P can fill the cistern in 14 hours, Pipe Q in 21 hours, and Pipe R can empty it in 42 hours. If all three pipes are opened together, how many hours will it take to fill the cistern completely?
15 hours
10.5 hours
12.5 hours
9 hours
10.5 hours
Practice and solve "A large cistern is being filled by two inlet pipes, P and Q, and emptied by an outlet pipe R. Pipe P..." for Quantitative Aptitude - CCIManagement Trainee Marketing 01 Sep 2026 Shift 1. The correct answer is Option B: 10.5 hours. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Practice and solve "A large cistern is being filled by two inlet pipes, P and Q, and emptied by an outlet pipe R. Pipe P..." for Quantitative Aptitude - CCIManagement Trainee Marketing 01 Sep 2026 Shift 1. The correct answer is Option B: 10.5 hours. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.