There is a leakage at the bottom of tank which can empty the tank in 24 hours. Two taps A and B alone can fill the tank in 12 hours and 18 hours respectively. If tap A alone opened for first two hours while tap B opened for next two hours. After 4 hours, all the taps are opened simultaneously. In what time tank gets completely filled?
1
92/7 hours
2
80/3 hours
3
93/9 hours
4
98/3 hours
5
92/3 hours