document.write( "Question 143620: If it takes 5 people 7 hours to clean an office building, how long would it take 4 people to clean the same building. \n" ); document.write( "
Algebra.Com's Answer #104529 by scott8148(6628)\"\" \"About 
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it takes 35 (5*7) people-hours to clean the building\r
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\n" ); document.write( "\n" ); document.write( "35 hours for 1 person, 1 hour for 35 people\r
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\n" ); document.write( "\n" ); document.write( "for 4 people, 35/4 = 8.75 hours
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