document.write( "Question 338508: If it takes Roger 60 minutes to paint a wall. It takes Stephanie 40 minutes to paint the same wall. How long will it take Roger and Stephanie to paint the wall if the work together? \n" ); document.write( "
Algebra.Com's Answer #242625 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! These work problems are set up the same way...\r \n" ); document.write( "\n" ); document.write( "t/A + t/B = 1\r \n" ); document.write( "\n" ); document.write( "where t is the time worked together, and A and B are how lojng it takes themn by themselves and the 1 represents one job...so plugging in we get\r \n" ); document.write( "\n" ); document.write( "t/40 + t/60 = 1 multiply by 120\r \n" ); document.write( "\n" ); document.write( "3t + 2t = 120 \n" ); document.write( "5t = 120 \n" ); document.write( "t = 24 min \n" ); document.write( " |