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Mathematics 23 Online
OpenStudy (anonymous):

Tiana can clear a football field of debris in 3 hours. Jacob can clear the same field in 2 hours. If they decide to clear the field together, how long will it take them?

OpenStudy (radar):

Some will say the s|dw:1383582076666:dw|olution is the reciprocal of the sum of the reciprocal. that is correct.

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