Aptitude - Pipes and Cistern - Discussion
Discussion Forum : Pipes and Cistern - General Questions (Q.No. 13)
13.
A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?
Answer: Option
Explanation:
Time taken by one tap to fill half of the tank = 3 hrs.
| Part filled by the four taps in 1 hour = |  |
4 x | 1 |  |
= | 2 | . |
| 6 | 3 |
| Remaining part = | |
1 - | 1 | |
= | 1 | . |
| 2 | 2 |
 |
2 | : | 1 | :: 1 : x |
| 3 | 2 |
 x = |
|
1 | x 1 x | 3 | |
= | 3 | hours i.e., 45 mins. |
| 2 | 2 | 4 |
So, total time taken = 3 hrs. 45 mins.
Discussion:
53 comments Page 3 of 6.
Amar said:
1 decade ago
1. Time taken by a pipe to fill half the tank = 3 hrs.
2. So, time taken by 1st pipe along with 3 other similar pipes (i.e 4 pipes).
= 3 hrs/4.
= 180 min/4.
= 45 min.
Adding 1 and 2,
Total time taken = 3hr 45 min.
2. So, time taken by 1st pipe along with 3 other similar pipes (i.e 4 pipes).
= 3 hrs/4.
= 180 min/4.
= 45 min.
Adding 1 and 2,
Total time taken = 3hr 45 min.
Suvit said:
8 years ago
The first tank will take 3hrs to fill in half of the tank.
4 tanks will take 6/4=1.5hrs to fill the full tank.
but as half of the tank is already filled, it will take 0.75hr=45mins for the rest half tank.
4 tanks will take 6/4=1.5hrs to fill the full tank.
but as half of the tank is already filled, it will take 0.75hr=45mins for the rest half tank.
Sravanthi said:
2 decades ago
Time taken by 1 tap to fill half of the tank is =3hrs.
part filled by 4 taps in 1 hr=4*1/6=2/3.
then remaining part= 1-2/3=1/3 how is it 1/2 can anybody please tell
and what this ::symbol mean
part filled by 4 taps in 1 hr=4*1/6=2/3.
then remaining part= 1-2/3=1/3 how is it 1/2 can anybody please tell
and what this ::symbol mean
Aadarsh kumar said:
5 years ago
As we know, rate * time =capacity.
So, after half filled.
A*3=4A *t
t=3/4 hour.
So total time taken is the time taken by A to fill half i.e 3 hr + 3/4 hr = 3 hr 45 minutes.
Thanks.
So, after half filled.
A*3=4A *t
t=3/4 hour.
So total time taken is the time taken by A to fill half i.e 3 hr + 3/4 hr = 3 hr 45 minutes.
Thanks.
(3)
Sapna Singh Lodhi said:
7 months ago
The half tank filled in 3 hours since the full took 6 hours.
So, the rest half will be filled by 4 tap = 3 * 60/4 = 45.
Complete time to fill the tank = 3 hours 45 min.
So, the rest half will be filled by 4 tap = 3 * 60/4 = 45.
Complete time to fill the tank = 3 hours 45 min.
(2)
Anomie said:
5 years ago
Tank filled in 1hr =6units.
For half an hour =3units.
Remaining 3units.
Now 3 more taps.....+previous 1 tap =4taps.
Efficiency =3/4.
Total =3*3/4(60)=3hr 45min.
For half an hour =3units.
Remaining 3units.
Now 3 more taps.....+previous 1 tap =4taps.
Efficiency =3/4.
Total =3*3/4(60)=3hr 45min.
Gopi said:
5 years ago
@ Sravanthi :
only one tap fill the half tank. So, the remaining four should fill the remaining half tank.
Hence. 1 - 1/2 = 1/2.
It's should not be 1-2/3.
only one tap fill the half tank. So, the remaining four should fill the remaining half tank.
Hence. 1 - 1/2 = 1/2.
It's should not be 1-2/3.
Faysal said:
6 years ago
Quick one:
1 pipe fills half of the tank=6/=3 hrs.
Remaining half,
1 pipe takes 3 hr.
4 '' '' =3/4 hr= 45 mins.
Total = 3hrs+45mins(Answer)
1 pipe fills half of the tank=6/=3 hrs.
Remaining half,
1 pipe takes 3 hr.
4 '' '' =3/4 hr= 45 mins.
Total = 3hrs+45mins(Answer)
(2)
Aparna said:
1 decade ago
2/3:1/2::1:x.
X = (1/2*1*3/2) = 3/4.
I did not got these two steps shall you explain me please in this step what is X why we should take the ratio.
X = (1/2*1*3/2) = 3/4.
I did not got these two steps shall you explain me please in this step what is X why we should take the ratio.
M Ganesh said:
5 years ago
Here we are assuming rate =100
As per the statement,
A
R=100 h=? Capacity =300
=300/100=3.
A+B+C+D =300/400=0.75=45min
=> 3hr +45 min = 3hr 45.
As per the statement,
A
R=100 h=? Capacity =300
=300/100=3.
A+B+C+D =300/400=0.75=45min
=> 3hr +45 min = 3hr 45.
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