Mathematics, 02.12.2019 10:31 avery4428
17. an empty swimming pool can be filled in 18 hours. if the pool is full, it takes 72 hours to drain it. how long will it take to fill the empty pool with the drain left
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17. an empty swimming pool can be filled in 18 hours. if the pool is full, it takes 72 hours to drai...
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