Aptitude - Pipes and Cistern - Discussion
Discussion Forum : Pipes and Cistern - General Questions (Q.No. 2)
2.
Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in:
Answer: Option
Explanation:
| Net part filled in 1 hour |  |
1 | + | 1 | - | 1 |  |
= | 17 | . |
| 5 | 6 | 12 | 60 |
 The tank will be full in |
60 | hours i.e., 3 | 9 | hours. |
| 17 | 17 |
Discussion:
57 comments Page 1 of 6.
Nisha said:
12 months ago
5'6'-12 LCM is 60.
So 12. 10. -5 then 12 + 10 - 5 = 17.
Then 60/17 = 3 (9/17) answer.
So 12. 10. -5 then 12 + 10 - 5 = 17.
Then 60/17 = 3 (9/17) answer.
(7)
Madhumita said:
1 year ago
First take a, b, c = 5, 6, 12.
Take a lcm of a, b, c = 60.
And divide by 5/60, 6/60, 12/60.
We get the answer of 12, 10,-5 because c can empty the tank it takes it as a negative term.
12 + 10 - 5 = 17.
Then divide by 60/17.
We get 3.58.
So, the answer is3(9/17).
Take a lcm of a, b, c = 60.
And divide by 5/60, 6/60, 12/60.
We get the answer of 12, 10,-5 because c can empty the tank it takes it as a negative term.
12 + 10 - 5 = 17.
Then divide by 60/17.
We get 3.58.
So, the answer is3(9/17).
(10)
Sanjiv said:
3 years ago
Superb explanation. Thanks @Manasa.
(5)
Akshay kenjila said:
4 years ago
@Manasa.
Soperb explainations. Thank you.
Soperb explainations. Thank you.
(1)
Naren said:
4 years ago
Thanks for explaining @Manasa.
(1)
BISWANATH TRIPATHY said:
4 years ago
How it is possible? Explain, please.
(2)
Marion said:
5 years ago
How does 60/17 become 39/17? Explain me.
(1)
Sireeshadevi koppisetti said:
5 years ago
Thanks @Subrat Kumar Dhani.
(1)
Rupa said:
6 years ago
@Sekhar.
17*3+9/60 = 60/17.
17*3+9/60 = 60/17.
Lavanya said:
6 years ago
Thanks all.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers