Q41. Pipe A can fill a tank in 30 minutes, Pipe B in 40 minutes, and Pipe C in 60 minutes. An outlet pipe, D, can empty the full tank in 20 minutes. If all four pipes are opened simultaneously, how long will it take to fill the tank?Mathematics — Ratio And Proportion — Question 41 of 75A. 20 minutesB. 40 minutesC. 24 minutesD. 15 minutesPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →