document.write( "Question 1087137: Marita can prepare the payroll in 6 hours. If charles help her, they can finish it in 4 hours. How long would it take charles to do the job alone? \n" ); document.write( "

Algebra.Com's Answer #701470 by jorel1380(3719) $\"\"$ $\"About$

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Marita can prepare the payroll in 6 hours. Therefore, she does 1/6th of the payroll per hour. Let c be the time in takes charles to do the job alone. Then:
\n" ); document.write( "1/6+1/c=1/4
\n" ); document.write( "2c+12=3c
\n" ); document.write( "c=12
\n" ); document.write( "It takes Charles 12 hours to do the payroll alone.
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