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Pipe A can fill in 20 minutes and Pipe B in 30 mins
and Pipe C can
empty the same in 40 mins.If all of them work
together, find the time
taken to fill the tank
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Answer / jayashree
1/20 +1/30 -1/40
30+20/600 -1/40
1/12 -1/40
7/120
then d answer ll be 120/7 this can be returns as 17 1/7mins
| Is This Answer Correct ? | 55 Yes | 2 No |
Answer / ravi savaliya
a fill - 1/20 per minute
b fill - 1/30 per minute
c can empty - 1/40 per minute
Suppose this take x minute
1 x +1x - 1x
--- -- ---- =1
20 30 40
Solve this x=17(approximately)
| Is This Answer Correct ? | 29 Yes | 8 No |
Answer / vishnu gupthan nair
Volume = Gallons/Minute x Minutes ==> V = Rt
V = 20a = 30b = 40c
Express a and b in terms of c:
a = 2c
b = 4c/3
With all pipes open, the fill rate becomes:
R = a+b-c
R = 2c+4c/3-c
R = 7c/3
Time required is Volume / Fill Rate:
t = V/R
t = 40c/(7c/3)
t = 120/7
t = 17.14 minutes
| Is This Answer Correct ? | 15 Yes | 2 No |
Answer / daniel
If the pipes work together, the fill pipes are open, and the
"empty" pipe is closed.
So, it will take about 8.3 minutes to fill the tank.
| Is This Answer Correct ? | 14 Yes | 2 No |
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