The amount of time that B takes to fill the tank, pipe A fills it in its one fourth time. Pipe C takes 3 times the time taken by pipe A. If all three pipes are opened simultaneously, it takes 33 hours to fill the tank. If pipe C is not switched on, how many hours will it take to fill the tank?
1
42.4
2
41.5
3
42.1
4
41.8