Q13. Pipe A can fill a tank in 10 hours. It is opened for 2 hours, after which Pipe B is also opened. If the remaining part of the tank is filled in 4 more hours, how long would Pipe B take to fill the tank alone?Mathematics — FAST Mock 1 — Question 13 of 120A. 15 hoursB. 10 hoursC. 20 hoursD. 12 hoursPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →