document.write( "Question 321163: I am very confused, I have absolutely no idea how to solve this word problem. Please help me solve the problem: If Sally can paint a house in four hours, John can paint the same house in six hours. How long will it take them to paint it together? \n" ); document.write( "
Algebra.Com's Answer #229989 by mananth(16946)![]() ![]() You can put this solution on YOUR website! Painting the house is considered as 1 job\r \n" ); document.write( "\n" ); document.write( "Sally can paint a house in four hours, \n" ); document.write( "so sally can do 1/4 of the job in 1 hour \n" ); document.write( "John can paint the same house in six hours. \n" ); document.write( "John can do 1/6 job in 1 hour \n" ); document.write( ". \n" ); document.write( "They together can do 1/4 + 1/6 of the job in 1 hour. \n" ); document.write( "1/4 + 1/6 = 3+2 / 12 \n" ); document.write( "= 5/12 of the job in 1 hour \n" ); document.write( "so to do 1 job they take 12/5 hours \n" ); document.write( "= 2.4 hours \n" ); document.write( "They together can paint the house in 2.4 hours \n" ); document.write( " |