document.write( "Question 965418: working together john and bob can paint a house in 3 1/2 hours. working alone bob can do the job in 6 hours. how long does it take for john to do the job alone? \n" ); document.write( "
Algebra.Com's Answer #590113 by macston(5194)![]() ![]() You can put this solution on YOUR website! Bob paints 1 house in 6 hours or 1house/6hrs=1/6 house/hr=1.67 house/hr \n" ); document.write( "In 3.5 hours he paints (3.5hrs)(1.67 house/hr)=0.583 house, so in 3.5 hours, \n" ); document.write( "John painted the rest or 1-0.583=0.417 of the house. \n" ); document.write( "So John paints (0.417 house)/3.5 hours=0.119 house/hr and to paint the whole house: \n" ); document.write( "(1 house)/(0.119 house/hr)=8.4 hours \n" ); document.write( "ANSWER: It would take John 8.4 hours to paint the house alone. \n" ); document.write( " |