If the pipes work together, the fill pipes are open, and the "empty&

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

Question Posted / daniel

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Answer Posted / 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.

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