A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank ?
A. 35 hrs
B. 25 hrs
C. 20 hrs
D. Cannot be determined
Pipes and Cisterns
Pipes and Cisterns aptitude questions and answers for competitive exams. Pipes and Cisterns MCQs for test preparation and entry tests.
Two pipes A and B can fill a tank in 15 min and 20 min respectively. Both the pipes are opened together but after 4 min, pipe A is turned off. What is the total time required to fill the tank ?
A. 12 min 30 sec
B. 14 min 40 sec
C. 10 min 20 sec
D. 11 min 45 sec
Two pipes A and B can fill a cistern in 37 1/2 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the pipe B is turned off after ?
A. 9 min
B. 15 min
C. 5 min
D. 10 min
Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours. C is closed A and B can fill the remaining par in 7 hours. The number of hours taken by C alone to fill the tank is ?
A. 6
B. 17
C. 10
D. 14
A top can fill a cistern in 8 hours and another can empty it in 16 hours. If both the taps are opened simultaneously the time (in hours) to fill the tank is _____ ?
A. 24
B. 16
C. 8
D. 10
One top can fill a cistern in 2 hours and another can empty the cistern in 3 hours. How long will they take to fill the cistern if both the taps are opened ?
A. 6 Hours
B. 8 Hours
C. 5 Hours
D. 7 Hours
A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full the leak will empty it in _____ ?
A. 25 hrs
B. 40 hrs
C. 16 hrs
D. 20 hrs
One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in ______ ?
A. 144 min.
B. 192 min.
C. 81 min.
D. 108 min.
A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened . What is the total time taken to fill the tank completely ?
A. 4 hrs
B. 4 hrs 15 min
C. 3 hrs 15 min
D. 3 hrs 45 min
A cistern can be filled by a tap in 4 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled ?
A. 5 hrs
B. 6.5 hrs
C. 7.2 hrs
D. 4.5 hrs