A tank can be filled by two taps `A\ a n d\ B` in 12 hours and 16 hours respectively. The full tank can be emptied by a third tap in 8 hours. If all the taps be turned on at the same time, in how much time will the empty tank be filled up completely?

A cistem can be filled by two pipes A and B 4 hours and 6 hours respectively. When full , the tank can emptied by a third pipe C in 8 hours. If all taps are turned on at the same time the cistern will be full in ?

A tank fills two taps A and B in 10 hours and 12 hours respectively, while the tap C empties it in 20 hours. If all three tubes are opened simultaneously In how long will the tank be filled?

Two pipes can fill a tank in 10 hours and 12 hours respectively. While a third pipe empted the full tank in 20 hours. If all the three pipes operate simultaneously, in how much time the tank will be filled ?

Taps A and B can fill a tank in 2 and 8 hours, respectively. Tap C can empty the filled tank in 4 hours. If all the three taps are turned on simultaneously, how much time will it tank to fill the tank completely? (a)3 hours (b) (9)/(2) hours (c) (3)/(8) hours (d) (8)/(3) hours

A tank can be filled by two taps X and Y in 5 hrs and 10 hrs respectively while another tap Z empties the tank in 20 hrs. In how many hours can the tank be filled if all 3 taps kept open ? A. 5 B. 4 C. 7 D. 8

Two tap can fill a cistern in 8 hours and 10 hours respectively.A third tap can empty it in 6 hours.How long will they take to fill the cistern if all the taps are opened.

Pipe A can fill an empty tank in 5 hours while pipe B can empty the full tank in 6 hours.If both are opened at the same time in the empty tank,how much time will they take to fill it up completely?

Two pipes A and B can fill a tank in 15 hours and 20 hours respectively while a third pipe C can empty the full tank in 25 hours. All the three pipes are opened in the begining. After 10 hours, C is closed. In how much time, will the tank be full?