Two pipes can fill a tank in 6hours and 8 hours .While a third pipe empties the full tank in 12hours.If all the three pipes are operate simultaneously, In how much time will the tank be filled ?
A tap can fill a tank in 6hrs.After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely ?
B)3hrs 15 min
C)3hrs 45 min
Two pipes can fill a tank in 8 hours and 10 hours .If two pipes are operate simultaneously, In how much time will the tank be filled ?
Two pipes A and B can fill a tank in 20 minutes and 40 minutes.If both pipes are opened simultaneously , after how much time should B be closed so that the tank is full in 18 minutes ?
Three taps P,Q and R can fill a tank in 10,20 and 30 hours respectively. If A is open all the time and Q and R are open for one hour each alternatively ,the tank will be fill in
B)7 hours 30min
D)7hours 20 min