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 2 of 6.
Nelson said:
1 decade ago
@Sameera, the tank will be filled as you can see the rate of filling is more than the rate of emptying. If the tank can't be filled, then the math would have told us so.
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
Jyothi said:
1 decade ago
@komal
net part in 1 hour is 17/60 part
so in 60/17 hour the part will be 1
here 1 means tank is full.....
its just like the time and wok concept...
net part in 1 hour is 17/60 part
so in 60/17 hour the part will be 1
here 1 means tank is full.....
its just like the time and wok concept...
Alka said:
1 decade ago
@Happy.
First of all take L.C.M of 5, 6, &12. Then divide this L.C.M with every numerator & multiply that value with denominator of same.
First of all take L.C.M of 5, 6, &12. Then divide this L.C.M with every numerator & multiply that value with denominator of same.
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)
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.
Ragavi said:
6 years ago
How to calculate it when the time is in minutes (intsead of hrs)? Please tell me.
(1)
Kavi said:
7 years ago
@Neha how?
(51/180)dividing numerator &denominator by 2.
= (17/60).
(51/180)dividing numerator &denominator by 2.
= (17/60).
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.
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