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 2 of 4.
Pooarasu said:
2 years ago
Let x be the minutes that B opened,
4(1/15 +1/20) + x (1/20) = 1.
x=10 2/3 => 10min 40sec.
After solving x = 10min 40sec +4 min =>14min 40 =>answer.
4(1/15 +1/20) + x (1/20) = 1.
x=10 2/3 => 10min 40sec.
After solving x = 10min 40sec +4 min =>14min 40 =>answer.
(8)
Rkay said:
2 years ago
A = 15.
B = 20.
Lcm = 60.
Capacity A - 4
B - 3
(4+3)*4min = 28.
Remain 32.
By b only 32/3 = 10 2/3 ie 10m 40sec.
T time 14min 40sec.
B = 20.
Lcm = 60.
Capacity A - 4
B - 3
(4+3)*4min = 28.
Remain 32.
By b only 32/3 = 10 2/3 ie 10m 40sec.
T time 14min 40sec.
(11)
Ramees said:
10 years ago
Easy to convert 44/3 into 14(2/3).
Divide 44 into 3 we get remainder 2(i.e 14*3 = 42).
Then we can write 14 (remainder/3) that is 14(2/3).
Divide 44 into 3 we get remainder 2(i.e 14*3 = 42).
Then we can write 14 (remainder/3) that is 14(2/3).
Anuraag2201 said:
1 decade ago
For all those who do not have clue as to how to convert improper fractions to mixed fractions. :/.
Are you sure are ready for quants?
Are you sure are ready for quants?
Vinay kumar gupta said:
6 years ago
In the question, it asks about the time required. It is not asking about total time so the answer will be 10 minute and 40 seconds.
Sundar said:
1 decade ago
@Talha
It is simple yaar.
44/3 minutes =
= 14(2/3) mins
= 14 min 40 seconds ( 2/3 x 60 = 40 seconds)
= 14 min 40 seconds.
It is simple yaar.
44/3 minutes =
= 14(2/3) mins
= 14 min 40 seconds ( 2/3 x 60 = 40 seconds)
= 14 min 40 seconds.
Santhu said:
1 decade ago
Hi kalpana how u solve this x value
4/15+x/20=1
from above equation x val is = 46/3 its not 44/3....
4/15+x/20=1
from above equation x val is = 46/3 its not 44/3....
Vipul Chaudhary said:
2 years ago
Let x be the minutes that B opened,
4 (1/15) + x (1/20) = 1.
After solving x = 14min 40sec => answer.
4 (1/15) + x (1/20) = 1.
After solving x = 14min 40sec => answer.
(3)
Sudan said:
1 decade ago
I am weak in Maths. Please can anyone help me how to convert 44/3 into 14(2/3) ?
Debalina Roy said:
7 years ago
"1/20 :8/15 :: 1:x " I can't understand this. Please explain me.
(2)
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