Mathematics, 12.08.2019 20:30 deadslinger5134

It takes 12 hours to fill a pool with the inlet pipe. it can be emptied in 15 hours with the outlet pipe. if the pool is 2 3 full to begin with, how long will it take to fill it from there if both pipes are open?

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It takes 12 hours to fill a pool with the inlet pipe. it can be emptied in 15 hours with the outlet...