document.write( "Question 662376: could anybody please help me with this, I just don't know how to solve this problem....thank you......sue, an experienced shipping clerk,can fill a certain order in 5 hours. Jim, a new clerk, needs 12 hours to do the same job. Working together how long will it take them to fill the order?....thanks \n" ); document.write( "

Algebra.Com's Answer #412224 by josmiceli(19441) $\"\"$ $\"About$

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To solve all these types of problems,
\n" ); document.write( "add their rates of working to get their
\n" ); document.write( "rate working together
\n" ); document.write( "In words:
\n" ); document.write( "( 1 job / Sue's time to do the job ) + ( 1 job / Jim's time to do the job )
\n" ); document.write( "= ( 1 job / time for both working together )
\n" ); document.write( "-----------------
\n" ); document.write( "Let $\"+t+\"$ = time in hrs for both working together
\n" ); document.write( "Filling in the numbers:
\n" ); document.write( " $\"+1%2F5+%2B+1%2F12+=+1%2Ft+\"$
\n" ); document.write( "Multiply both sides by $\"+60t+\"$
\n" ); document.write( " $\"+12t+%2B+5t+=+60+\"$
\n" ); document.write( " $\"+17t+=+60+\"$
\n" ); document.write( " $\"+t+=+60%2F17+\"$
\n" ); document.write( "Working together, they can do the job in about 3.53 hrs
\n" ); document.write( "or about 3 hrs 32 min\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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