Mathematics

Mathematics, 13.06.2020 16:57, officialrogerfp3gf2s

One pump can empty the pool in 36 hours. The second pump is twice faster. After both pumps, working together emptied 13 of a pool the second pump broke. The first pump finished the job. How long did it take to empty the pool?

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One pump can empty the pool in 36 hours. The second pump is twice faster. After both pumps, working...

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