document.write( "Question 678489: Roger can complete a job in 5 hours and Alex can complete the same job in 10 hours. How many hours will it take both of them to complete the job if they work together? \n" ); document.write( "
Algebra.Com's Answer #421496 by ankor@dixie-net.com(22740)\"\" \"About 
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Roger can complete a job in 5 hours and Alex can complete the same job in 10 hours.
\n" ); document.write( " How many hours will it take both of them to complete the job if they work together?
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\n" ); document.write( "Let t = time working together
\n" ); document.write( "Let the completed job = 1
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\n" ); document.write( "\"t%2F5\" + \"t%2F10\" = 1
\n" ); document.write( "2t + t = 10
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\n" ); document.write( "3t = 10
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\n" ); document.write( "t = 10/3
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\n" ); document.write( "t = 3\"1%2F3\" hrs\r
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