document.write( "Question 563720: If three people working together can clean an office suite in two hours, how long will it take a crew of four people to clean the office? \n" ); document.write( "
Algebra.Com's Answer #365001 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "3 people clean 1 office in 2 hours, so\r
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\n" ); document.write( "\n" ); document.write( "3 people clean 1/2 of an office in 1 hour, so\r
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\n" ); document.write( "\n" ); document.write( "1 person cleans 1/6 of an office in 1 hour, so\r
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\n" ); document.write( "\n" ); document.write( "4 people clean 4/6 = 2/3 of an office in 1 hour, so\r
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\n" ); document.write( "\n" ); document.write( "4 people clean 1 office in 3/2 of an hour, i.e. 1 hour 30 minutes.\r
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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