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-- The first person does 1/8 of the job each hour.

-- Together, they do 1/6 of the job each hour.

-- The second person does (1/6 - 1/8) = (4/24 - 3/24) = 1/24 of the job each hour,

so it takes that poor guy 24 hours if he has to do the whole job alone.

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13y ago

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