There are 2 inlet pipes and 2 outlet pipes. The efficiency of one of the inlet pipes double than that of another inlet pipe. The efficiency of outlet pipes half that of the lesser efficient inlet pipes. The empty tanks get filled in 16 hours when all the pipes are open. How many hours will be taken to fill the empty tank when the lesser efficiency inlet pipe is closed and rest are opened?
1
26 hours
2
27 hours
3
28 hours
4
32 hours
5
29 hours