document.write( "Question 365424: Martha can rake the leaves in her yard in 4 hours. Her younger brother can do the job in 6 hours. How long will it take them to do the job if they work together? \n" ); document.write( "
Algebra.Com's Answer #260497 by mananth(16946)![]() ![]() You can put this solution on YOUR website! Martha can rake the leaves in her yard in 4 hours. \n" ); document.write( "So she does 1/4 of the job in 1 hour \n" ); document.write( " Her younger brother can do the job in 6 hours. \n" ); document.write( "so he can do 1/6 of the job in 1 hour \n" ); document.write( "Together they will do 1/6 +1/4 of the job in 1 hour \n" ); document.write( "= (2+3)/12 \n" ); document.write( "=5/12 \n" ); document.write( "They do 5/12 of the job in 1 hour \n" ); document.write( "so they will do the job yogether in 12/5 hours \n" ); document.write( "=2.4 hours \n" ); document.write( ".. \n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " |