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 Posted / 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 |
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