document.write( "Question 351851: three people painting a wall takes 2.5 hours. how many hours does it take for five people to paint the wall? \n" ); document.write( "
| Algebra.Com's Answer #251413 by ankor@dixie-net.com(22740)     You can put this solution on YOUR website! three people painting a wall takes 2.5 hours. \n" ); document.write( " how many hours does it take for five people to paint the wall? \n" ); document.write( ": \n" ); document.write( "We can use man-hrs here \n" ); document.write( ": \n" ); document.write( "3*2.5 = 7.5 man-hrs to complete the job \n" ); document.write( ": \n" ); document.write( "Let t = time for 5 to do it \n" ); document.write( ": \n" ); document.write( "5t = 7.5 \n" ); document.write( "t = \n" ); document.write( "t = 1.5 hrs for 5 to complete the job \n" ); document.write( " |