Mathematics, 11.11.2019 00:31 choltox8840

One costodian cleans a suite of offices in 5 hours. when a second worked is asked to join the regular custodian, the job takes only 3 (1/3) hours how long does it take the second worker to do the same job alone?

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One costodian cleans a suite of offices in 5 hours. when a second worked is asked to join the regula...

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