document.write( "Question 157874This question is from textbook
\n" ); document.write( ": one person proofreads a copy for a small newspaper in 4 hours. If a second proofreader is also emplyoed, the job can be done in 2.5 hours. how long does it take for the 2nd proofreader to do the job alone. \n" ); document.write( "

Algebra.Com's Answer #116320 by vleith(2983) $\"\"$ $\"About$

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The first reader can do 1/4 of the job in an hour. (0.25 job/hour)
\n" ); document.write( "The two together can do 1/2.5 of the job in a hour. (0.4 job/hour)\r
\n" ); document.write( "\n" ); document.write( "You are asked to find the work rate of reader 2.\r
\n" ); document.write( "\n" ); document.write( " $\"readerOneRate+%2B+readerTwoRate+=+bothRate\"$
\n" ); document.write( " $\"0.25+%2B+r2+=+0.4+\"$
\n" ); document.write( " $\"r2+=+0.4+-+0.25\"$
\n" ); document.write( " $\"r2+=+0.15\"$ \r
\n" ); document.write( "\n" ); document.write( "So reader 2 can do 0.15 job/hour.
\n" ); document.write( "How many hours to do the whole job?
\n" ); document.write( "h*0.15 = 1
\n" ); document.write( "h = 1/0.15
\n" ); document.write( "h = 6.666 hours (or 6 hours and 40 minutes) \n" ); document.write( "

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