Q18. Three pipes A, B, and C can fill a tank in 10, 15, and 30 hours, respectively. All three pipes are opened for 2 hours, after which pipe C is closed. How much longer will it take for pipes A and B to finish filling the tank?Mathematics — FAST Mock 7 — Question 18 of 120A. 3 hoursB. 3.6 hoursC. 5 hoursD. 2 hoursPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →