One fill pipe A takes 3 minutes more to fill the cistern than two fill pipes A and B opened together to fill it. Second fill pipe B takes
(A) 7 minutes
(B) 16 minutes
(C) 8 minutes
(D) 10 minutes
(E) 12 minutes
If all three pipes are opened for 2 minutes to fill the tank each alternatively in the sequence of A then C and then B. Calculate water filled by pipes A is what % of water filled by pipe C?
(A) 72.5 %
(B) 75 %
(C) 77.5 %
(D) 80 %
(E) 82.5 %
A pump can fill a cistern in 40 minutes and another pump can empty the filled up cistern in 1 hour. By mistake, without closing the second pump, the first pump is opened. The time in which the empty cistern will be filled up is
(A) 3 hours
(B) 4 hours
(C) 1 hours
(D) 2 hours
A cistern can be filled by two pipes filling separately in 12 and 16 min respectively. Both pipes are opened together for a certain time but being obstructions, only 7/8 of full quantity water flows through the former and only 5/6 through the latter pipe. The obstructions, however, being suddenly removed, the cistern is filled in 3 minutes from that moment. How long was it obstructions before the full flow began?
(A) 4.5 min
(B) 2.5 min
(C) 3.5 min
(D) 5.5 min
If 20 taps can fill a tank in 14 hours, then how many times will 35 taps fill that tank?
(A) 8 hour
(B) 6 hour
(C) 14 hour
(D) 10 hour
Pipes A and B together can fill a tank in 16 hours, whereas pipe C alone can empty the full tank in 24 hours. A and B were opened together for 10 hours and then closed. Pipe C was then opened. The tank will now be emptied by C in:
(A) 18 hours
(B) 14 hours
(C) 16 hours
(D) 15 hours
Pipes A and B are emptying pipes and can empty a tank in 6 hours and 16 hours, respectively. C is a filling a pipe. All the three pipes were opened together. They took 80 minutes to empty
(A) 36 hours
(B) 42 hours
(C) 48 hours
(D) 40 hours
Four pipes P, Q, R and S can fill a cistern in 25, 20, 50 and 40 hours respectively. The pipe Q was opened at 7 pm, P at 9 pm, S at 10 pm and R at 11 pm. When will the cistern be full?
(A) 3 : 29 AM
(B) 2 : 47 AM
(C) 4 : 09 AM
(D) 5 : 02 AM
A pipe can fill a tank in 72 minutes. But there is a leak in the bottom of the tank due to which the tank is filled in 18 minutes more. Find in how many hours the leak can empty a full tank ?
(A) 7 hrs
(B) 6.5 hrs
(C) 9 hrs
(D) 6 hrs
Two pipes, A and B, can fill a tank in X minutes and 6 minutes, respectively. If both the pipes are used together, then they take 1.5 minute to fill the tank. Find the value of X.
(A) 1 min
(B) 4 min
(C) 5 min
(D) 2 min
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