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To complete a task In 16 days a company needs 5 people 6 hours a day. How long will it take 8 people 4 hours a day, assuming they work at the same rate

 Feb 2, 2020
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With dimensional analysis:

 

Total hours needed   =   5 p x 6 hr/d x 16 d = 480 p - hr

 

480 p-hr /(8p 4h)/d   = 15 days

 Feb 2, 2020

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