Discussion
Home ‣ Aptitude ‣ Pipes and Cistern Comments
- Question
- Pipes A and B can fill a tank in 10 hours and 15 hours respectively. Both together can fill it in?
Options- A. 121/2 hours
- B. 6 hours
- C. 5 hours
- D. None of these
- Correct Answer
- 6 hours
ExplanationPart filled by A in 1 hour = 1/10
Part filled by B in 1 hours = 1/15
Part filled by (A + B) in 1 hour = (1/10 + 1/15) = 5/30 = 1/6
? Both pipes together can fill the tank in 6 hours. - 1. A tap 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?
Options- A. 8
- B. 10
- C. 16
- D. 24 Discuss
- 2. A pipe can fill a tank in x hours and another can empty it in y hours. They can together fill it in (y > x)?
Options- A. (x - y) hours
- B. (y - x ) hours
- C. xy / (x - y) hours
- D. xy / ( y - x) hours Discuss
- 3. One tap 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?
Options- A. 5 hours
- B. 6 hours
- C. 7 hours
- D. 8 hours Discuss
- 4. 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?
Options- A. 3 hours 18 min.
- B. 3 hours 26 min.
- C. 3 hours 42 min.
- D. 3 hours 48 min. Discuss
- 5. A tap can fill a tank in 16 minutes and another can empty it in 8 minutes. If the tank is already half full and both the taps are opened together, the tank will be?
Options- A. Filled in 12 min.
- B. Emptied in 12 min.
- C. Filled in 8 min.
- D. Emptied in 8 min. Discuss
- 6. Three are two taps to fill a tank while a third to empty it. When the third tap is closed, they can fill the tank in 10 minutes and 12 minutes respectively. If all the three taps be opened, the tank is filled in 15 minutes. If the first two taps are closed, in what time can the third tap empty the tank when it is full?
Options- A. 7 min.
- B. 9 min. and 32 sec.
- C. 8 min. and 34 sec.
- D. 6 min. Discuss
- 7. A tap can fill a tank in 25 minutes and another can empty it in 50 minutes. Find whether the tank will be filled up or emptied and in how many minutes?
Options- A. Tank is emptied in 20 minutes
- B. Tank is filled up in 50 minutes
- C. Tank is filled up in 20 minutes
- D. Tank is emptied in 25 minutes Discuss
- 8. Two pipes A and B can fill a tank in 18 and 6 h, respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?
Options- A. 41/2h
- B. 7 h
- C. 6 h
- D. 10 h Discuss
- 9. A cistern can be filled up in 4 h by an inlet A. An outlet B can empty the cistern in 8 h. If both A and B are opened simultaneously, then after how much time will the cistern get filled?
Options- A. 5 h
- B. 7 h
- C. 8 h
- D. 6 h Discuss
- 10. Pipes A and B can fill a tank in 5 and 6 h, respectively. Pipe C can fill it in 30 h. If all the three pipes are opened together, then in how much time the tank will be filled up?
Options- A. 33/14 h
- B. 21/2 h
- C. 39/14 h
- D. 21/14 h Discuss
Pipes and Cistern problems
Search Results
Correct Answer: 16
Explanation:
Part filled by intel in 1 hour = 1/8
Part emptied by outlet in 1 hour = 1/16
Net filling in 1 hour = (1/8 - 1/16) = 1/16
? Time taken to fill the tank = 16 hours
Correct Answer: xy / ( y - x) hours
Explanation:
Net filling in 1 hour = (1/x - 1/y) = (y - x) / xy
? Time taken to fill the tank = xy / (y - x) hrs.
Correct Answer: 6 hours
Explanation:
Net filling in 1 hour = (1/2 - 1/3) = 1/6
? Time taken to fill the cistern = 6 hours
Correct Answer: 3 hours 26 min.
Explanation:
Net filling in 1 hour = (1/4 + 1/6 - 1/8) = 7/24
? Time taken to fill the cistern = (24/7) hrs. = 3 hrs. 26 min.
Correct Answer: Emptied in 8 min.
Explanation:
Part emptied in 1 min. = (1/8 - 1/16) = 1/16
? Time taken to empty the full tank = 16 min.
Hence, time taken to empty the half tank = 8 min.
Correct Answer: 8 min. and 34 sec.
Explanation:
Part emptied by the third pipe in 1 min (1/10 + 1/12) - 1/25 = 7/60
So, the full tank will be emptied by third pipe in = (60/7) min. = 8 min. 34 ec.
Correct Answer: Tank is filled up in 50 minutes
Explanation:
T = (25 x 50) / (50 - 25) = + 50 minutes
+ ve sign shows that tank is filled up in 50 minutes.
Correct Answer: 41/2h
Explanation:
Part filled by A in 1 h = 1/18
Part filled by B in by 1 h = 1/6
Part filled (A + B) in 1 h =1/18 + 1/6 = (1 + 3)/18 = 4/18 = 2/9
Hence, both the pipes together will fill the tank in 9/2 h or 41/2 h
Correct Answer: 8 h
Explanation:
Part filled by A in 1 h = 1/4
Part emptied by B in 1 h = 1/8
Part filled by (A + B) In 1 h = 1/4+ ( -1/8 ) = 1/4 - 1/8 = (2 - 1)/8 = 1/8
? Required time to fill the cistern = 8
Correct Answer: 21/2 h
Explanation:
Part filled by A in 1 h = 1/5
Part filled by B in 1 h = 1/6
Part filled by C in 1 h = 1/30
Net part filled by ( A + B + C ) in h 1 = ( 1/5 + 1/6 + 1/30 )
= (6 + 5 + 1)/30 = 12/30 = 2/5
? Required time to fill the tank = 5/2 = 21/2 h
Comments
There are no comments.More in Aptitude:
Programming
Copyright ©CuriousTab. All rights reserved.