Q15. A tank is filled by three pipes A, B, and C in 6, 8, and 12 hours, respectively. All pipes are opened together. After 2 hours, pipe C is closed. How much total time is required to fill the tank?Mathematics — Word Problems — Question 15 of 38A. 4 hoursB. 2 6⁄7 hoursC. 5 hoursD. 3 hoursPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →