Question (23/28)
Pipe A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all 3 pipes are opened together, then tank will be filled in how many hours ?(A) A
(B) B
(C) C
(D) D
Question (24/28)
Pipe A can fill tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in how many hours will the tank be filled ?(A) 2 Hours
(B) 2.5 Hours
(C) 3 Hours
(D) 3.5 Hours