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Charles can do a job in 1 hour, Bill can do the same . . job in 2 hours, and Bob can do the job in 3 hours.. . How long does it take them to do the job working. . together?

Charles can do a job in 1 hour, Bill can do the same . . job in 2 hours, and Bob can do the job in 3 hours.. . How long does it take them to do the job working. . together?
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Charles can do a job in 1 hour, Bill can do the same . . job in 2 hours, and Bob can do the job in 3 hours.. . How long does it take them to do the job working. . together?

User KiraLT
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1 Answer

5 votes
it would take 2 hours because of the average of 3 plus 2 plus 1 divided by 3

User Aghast
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