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 5 of 6.
Kiran said:
1 decade ago
@kaveri
1/5+1/6+-1/12=
L.C.M of 5,6,12=60
So 1/5+1/6-1/12
12+10-5
--------------= 17
60 --------
60
1/5+1/6+-1/12=
L.C.M of 5,6,12=60
So 1/5+1/6-1/12
12+10-5
--------------= 17
60 --------
60
Rohit said:
1 decade ago
Thanks neha.
Mageswari said:
1 decade ago
Thanks manasa your explanation is clear cut.
Divya said:
1 decade ago
Thanks manasa.
Rav said:
1 decade ago
Will it work in every case ?
Deepi said:
1 decade ago
Hi guys use this concepts to find the solution in easily
Concept 1:
A fill tank in x hrs and B fill in Y hrs and C in z hrs means together fill=?
A&B=X*y/x+y
let that A&B ans as p
then A,B&C=p*z/p+z
Concept 2:
A fill tank in x hrs and B empty in Y hrs then both together work how much time is to empty=?
=x*y/y-x
Concept 1:
A fill tank in x hrs and B fill in Y hrs and C in z hrs means together fill=?
A&B=X*y/x+y
let that A&B ans as p
then A,B&C=p*z/p+z
Concept 2:
A fill tank in x hrs and B empty in Y hrs then both together work how much time is to empty=?
=x*y/y-x
Neha said:
1 decade ago
(1/5 + 1/6 - 1/12) = (6+5/30 - 1/12)
= (11/30 -1/12)
= (132-30/360)
= (102/360)dividing numerator &denominator by 2
= (51/180)dividing numerator &denominator by 2
= (17/60)
= (11/30 -1/12)
= (132-30/360)
= (102/360)dividing numerator &denominator by 2
= (51/180)dividing numerator &denominator by 2
= (17/60)
(1)
Kaveri said:
1 decade ago
I can't understand how it is solved.
1/5+1/6-1/12 =17/60.
Please help.
1/5+1/6-1/12 =17/60.
Please help.
Happy said:
1 decade ago
I can't understand how it is solved.
1/5+1/6-1/12 =17/60.
Please help.
1/5+1/6-1/12 =17/60.
Please help.
Preeti said:
1 decade ago
Thanks Manasa. I got it clearly.
(1)
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