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 6 of 6.
Anita sahoo said:
10 years ago
1/5+1/6-1/12=17/60.
How it possible?
1/5+1/6-1/12=-1/20.
Why not? Please explain.
How it possible?
1/5+1/6-1/12=-1/20.
Why not? Please explain.
Anita sahoo said:
10 years ago
@Subrat please tell me how C is 5?
Bijayalaxmi said:
10 years ago
Formula: xyz/yz+xz-xy.
Pranav Kumar said:
10 years ago
I didn't understand this problem and can some one make it clear.
Sushmitha said:
10 years ago
17)60(3
51
= 60-51 = 9.
Then q*(r/d).
i.e 3*9/17.
51
= 60-51 = 9.
Then q*(r/d).
i.e 3*9/17.
Ang said:
1 decade ago
Why we didnt take ( 1/12 - (1/5+1/6) ). Here 12 is greater right?
Rakesh said:
9 years ago
@Alka your answer is best, so thanks.
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