document.write( "Question 899831: A three-person maintenance crew could clean a certain building in 4h,whereas a four-person crew could do the job in 3 h. if one worker of the four person crew was an hour late , how long did the job take ? \r
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Algebra.Com's Answer #545757 by richwmiller(17219)\"\" \"About 
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3*4=12
\n" ); document.write( "4*3=12
\n" ); document.write( "One person does 1/12 an hour
\n" ); document.write( "In the first hour 3 workers do 3/12=1/4 of the job instead of 4/12 =1/3
\n" ); document.write( "Then 4 workers have to do 12-3=9 worker hours to finish
\n" ); document.write( "9/4=2 1/4 hours
\n" ); document.write( "So they take another 2.25 hours or a total of 3.25 hours
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