One pipe can fill the tank in 21 minutes while another pipe can empty completely filled tank in 24 minutes. If both the pipes are operated together on empty tank, how long (in minutes) will it take to fill one-fourth of the tank?
Given:
Fill pipe rate = fills tank in 21 min
tank/min
Empty pipe rate = empties tank in 24 min
tank/min
Both start on an empty tank; find time to fill tank.
Formula Used:
Time =
Solution:
Net rate tank/min.
Time to fill tank = minutes.
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100 Questions
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