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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document.write( "HELP PLEASE !!!!! \n" );
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Algebra.Com's Answer #545757 by richwmiller(17219) You can put this solution on YOUR website! 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 \n" ); document.write( " |