Aptitude - Pipes and Cistern
Exercise : Pipes and Cistern - Data Sufficiency 2
- Pipes and Cistern - Formulas
- Pipes and Cistern - General Questions
- Pipes and Cistern - Data Sufficiency 1
- Pipes and Cistern - Data Sufficiency 2
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).
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