Aptitude - Pipes and Cistern - Discussion
Discussion Forum : Pipes and Cistern - General Questions (Q.No. 7)
7.
A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank?
Answer: Option
Explanation:
Suppose pipe A alone takes x hours to fill the tank.
| Then, pipes B and C will take | x | and | x | hours respectively to fill the tank. |
| 2 | 4 |
 |
1 | + | 2 | + | 4 | = | 1 |
| x | x | x | 5 |
 |
7 | = | 1 |
| x | 5 |
x = 35 hrs.
Discussion:
33 comments Page 4 of 4.
Saina said:
1 decade ago
Thanku nitish.
Nitish said:
1 decade ago
As pipe C is twice as fast as B and B is twice as fast as A so if a fill the tank in x min.
As B is Two Time Faster not slower so it will take half time less than A that's why we have taken pipe B will fill in x/2 hours in less time compared to A.
As B is Two Time Faster not slower so it will take half time less than A that's why we have taken pipe B will fill in x/2 hours in less time compared to A.
(1)
Suganthi said:
1 decade ago
Please any one help me
B is twice as fast A means
A=X; B=2X isn't it
Then how B = X / 2 will come
B is twice as fast A means
A=X; B=2X isn't it
Then how B = X / 2 will come
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