Pipes and Cisterns Formula for Competitive Exams
Pipes and Cisterns Formulas for Practice:
Q : Two pipe can fill a cistern in 3 hours and 4 hours respectively and a waste pipe can empty it in 2 hours. If all the three pipes are kept open, then the cistern will be filled in
(A) 5 hours
(B) 8 hours
(C) 10 hours
(D) 12 hours
Correct Answer : D
Three pipes A, B and C can fill a cistern in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The time taken by C alone to fill the cistern is_
(A) 10 hours
(B) 12 hours
(C) 14 hours
(D) 16 hours
Correct Answer : C
A cistern can be filled by two pipes A and B in 4 hours and 6 hours respectively. When full, the tank can be emptied by a third pipe C in 8 hours. If all the taps be turned on at the same time, the cistern will be full in
(A) $$ {2}{2\over 7}{\ hours}$$
(B) $$ {3}{3\over 7}{\ hours}$$
(C) $$ {4}{3\over 7}{\ hours}$$
(D) $$ {2}{5\over 7}{\ hours}$$
Correct Answer : B
Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, and Pipe C alone can empty the full tank in x hours. All the pipes were opened together at 10:30 a.m, but C was closed at 2:30 p.m. If the tank was full at 8:30 p.m on the same day, then what is the value of x?
(A) 48
(B) 96
(C) 64
(D) 45
Correct Answer : B
A tap drips at a rate of one drop/sec. 600 drops make 100ml. The number of litres wasted in 300 days is:
(A) 43200 litres
(B) 4320 litres
(C) 4320000 litres
(D) 432000 litres
Correct Answer : B
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Vikram Singh
Providing knowledgable questions of Reasoning and Aptitude for the competitive exams.
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