Mathematics, 23.09.2019 17:30 rcetrangolo
One pipe fills a storage pool in 20 hours. a second pipe fills the same pool in 15 hours. when a third pipe is added and all three are used to fill the pool, it takes only 6 hours. find how long it takes the third pipe to do the job.
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One pipe fills a storage pool in 20 hours. a second pipe fills the same pool in 15 hours. when a thi...
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