document.write( "Question 614391: It takes Paul 4 hours to do a job. It takes Peter 2 hours to do that same job. How many such jobs could they do together in 4 hours? \n" ); document.write( "

Algebra.Com's Answer #386603 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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It takes Paul 4 hours to do a job.
\n" ); document.write( " It takes Peter 2 hours to do that same job.
\n" ); document.write( " How many such jobs could they do together in 4 hours?
\n" ); document.write( ":
\n" ); document.write( "Let t = time when both of them to do one job
\n" ); document.write( "Let one completed job = 1
\n" ); document.write( ":
\n" ); document.write( " $\"t%2F4\"$ + $\"t%2F2\"$ = 1
\n" ); document.write( "multiply by 4
\n" ); document.write( "t + 2t = 4
\n" ); document.write( "3t = 4
\n" ); document.write( "t = $\"4%2F3\"$ hr for both of them to do one job
\n" ); document.write( ":
\n" ); document.write( "Find how many jobs they could do in 4 hrs
\n" ); document.write( "4 divided by $\"4%2F3\"$
\n" ); document.write( "invert the dividing fraction and multiply
\n" ); document.write( "4 * $\"3%2F4\"$ = 3 jobs in 4 hrs \n" ); document.write( "

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