Aptitude - Pipes and Cistern - Discussion
Discussion Forum : Pipes and Cistern - General Questions (Q.No. 10)
10.
Two pipes A and B can fill a tank in 15 minutes and 20 minutes respectively. Both the pipes are opened together but after 4 minutes, pipe A is turned off. What is the total time required to fill the tank?
Answer: Option
Explanation:
| Part filled in 4 minutes = 4 |  |
1 | + | 1 |  |
= | 7 | . |
| 15 | 20 | 15 |
| Remaining part = | |
1 - | 7 | |
= | 8 | . |
| 15 | 15 |
| Part filled by B in 1 minute = | 1 |
| 20 |
 |
1 | : | 8 | :: 1 : x |
| 20 | 15 |
| x = | |
8 | x 1 x 20 | |
= 10 | 2 | min = 10 min. 40 sec. |
| 15 | 3 |
The tank will be full in (4 min. + 10 min. + 40 sec.) = 14 min. 40 sec.
Discussion:
37 comments Page 3 of 4.
Sriganesh. S said:
5 years ago
Can anyone explain, why they multiplying 1 in (8/15) * (1*20)?
Revant said:
5 years ago
@Preeti.
Very clear solution. Thanks for explaining.
Very clear solution. Thanks for explaining.
(1)
Mahi said:
1 decade ago
Thanks kalapana your solution is time consuming.
Anjali said:
1 decade ago
Hi Kalpna,
How you write 44/3 = 14 min 40 sec ?
How you write 44/3 = 14 min 40 sec ?
Priya P. said:
1 decade ago
@ kalpna.
Thanks. Really less time consuming.
Thanks. Really less time consuming.
(1)
Neha said:
9 years ago
How to change the fraction value into minutes?
Leela said:
8 years ago
Can anyone tell me why do we equate to one?
Venky said:
8 years ago
Can anyone explain it in easy method?
Teju said:
1 decade ago
Can anybody explain 1/20:8/15::1:x?
Manisha said:
8 years ago
It is clear now Thank you, @Ashim.
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