One pipe fills a storage pool in 20 hours, another pipe fills the same pool in 15 hours.
if a...
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Mathematics, 22.12.2019 03:31 mia1518
One pipe fills a storage pool in 20 hours, another pipe fills the same pool in 15 hours.
if a third person joins and all together it takes 6hours, how long will it take the third person to fill the pool?
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