document.write( "Question 342164: A plumber and an assistant finished a job in 4h. The job would have taken the plumber 6 h working alone. how long would the job have taken the assistant working alone? \n" ); document.write( "

Algebra.Com's Answer #244908 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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A plumber and an assistant finished a job in 4h.
\n" ); document.write( " The job would have taken the plumber 6 h working alone.
\n" ); document.write( " how long would the job have taken the assistant working alone?
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\n" ); document.write( "Let a = time required by assistant working alone
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\n" ); document.write( "Let the completed job = 1
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\n" ); document.write( " $\"4%2F6\"$ + $\"4%2Fa\"$ = 1
\n" ); document.write( "multiply by 6a, results:
\n" ); document.write( "4a + 6(4) = 6a
\n" ); document.write( "24 = 6a - 4a
\n" ); document.write( "24 = 2a
\n" ); document.write( "a = $\"24%2F2\"$
\n" ); document.write( "a = 12 hrs, assistant alone \n" ); document.write( "

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