Aptitude - Pipes and Cistern - Discussion
Discussion Forum : Pipes and Cistern - Data Sufficiency 2 (Q.No. 1)
Directions to Solve
Each of the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
1.
If both the pipes are opened, how many hours will be taken to fill the tank? | |
I. | The capacity of the tank is 400 litres. |
II. | The pipe A fills the tank in 4 hours. |
III. | The pipe B fills the tank in 6 hours. |
Answer: Option
Explanation:
| II. Part of the tank filled by A in 1 hour = | 1 |
| 4 |
| III. Part of the tank filled by B in 1 hour = | 1 |
| 6 |
| (A + B)'s 1 hour's work = |  |
1 | + | 1 |  |
= | 5 |
| 4 | 6 | 12 |
 A and B will fill the tank in |
12 | hrs = 2 hrs 24 min. |
| 5 |
So, II and III are needed.
Correct answer is (B).
Discussion:
9 comments Page 1 of 1.
Zeel said:
2 weeks ago
Only after knowing the capacity of the tank can we decide the time taken to fill the container.
So, I think option 1 is right.
So, I think option 1 is right.
Siji.ph said:
9 years ago
1 hour in 60 Minutes.
Priya said:
10 years ago
Why 5/12 is converted to 12/5?
Ganesh said:
1 decade ago
Just divide 12 by 5 which is 2.4 hrs.
1 hr is 60 mins and 0.1 is 6 mins.
So 0.4*6 = 24 mins.
Hence 2 hr 24 mins.
1 hr is 60 mins and 0.1 is 6 mins.
So 0.4*6 = 24 mins.
Hence 2 hr 24 mins.
Shaik said:
1 decade ago
How to convert 12/5 hr into 2 hr 24 mins?
How to convert "Hr to mins"?
How to convert "Hr to mins"?
Abhishek said:
1 decade ago
By knowing the capacity of tank only, we can determine time taken by each pipe to fill it. As it is given 4, 6. It means the capacity of tank is known there. It is unnecessary for us (option 1 is not needed).
(1)
Arpit73 said:
1 decade ago
Please explain we would not know the quantity of the tank how is it possible to determine the time in which it will be filled by the 2 pipes together.
Naveen said:
1 decade ago
=12/5
=2*2/5hr
=2hr(2/5)*60 min
=2hr 24 mins//
=2*2/5hr
=2hr(2/5)*60 min
=2hr 24 mins//
BhargaV said:
1 decade ago
how 12/5 hrs. = 2 hrs. 24 min.
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