document.write( "Question 486782: Ella can do a job for 5 hours while it takes Lyn 3 hours to do the same job. Ella worked on the job alone for 30 minutes then joined by Lyn. In how many hours will the job be finished? \n" ); document.write( "

Algebra.Com's Answer #332766 by chessace(471) $\"\"$ $\"About$

You can put this solution on YOUR website!
E does 1/5 job per hour, L does 1/3 per H.
\n" ); document.write( "E does .5 * 1/5 job alone = 0.1 job.
\n" ); document.write( "Together they do 1/5 + 1/3 per hour, total (3+5)/15 job/H
\n" ); document.write( "Let as usual answer = x = hours to finsh.
\n" ); document.write( "8 x / 15 = 1-0.1
\n" ); document.write( "x = 0.9 * 15 / 8
\n" ); document.write( "x = 1.6875 hours.
\n" ); document.write( " \n" ); document.write( "

\n" );