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OpenStudy (anonymous):
if it takes two people 60 hours to build a fence, how long will it take three people to do the same job?
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OpenStudy (anonymous):
40?
OpenStudy (anonymous):
how did you determine 40
OpenStudy (anonymous):
It takes less time for 3 people than 2
OpenStudy (anonymous):
20?
OpenStudy (anonymous):
i understand that but why not 30 or 20 hours
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OpenStudy (anonymous):
20
OpenStudy (grace111):
maybe 30
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