Question 567857
Painting the kitchen is 1 job		1 job			
Painter	12	hours			
he does	  1/12	job in 1	hour		
Apprentice	36	hours			
he does 	  1/36	of thejob in 1 	hour		
	
					
Together they will do 		  1/12	+	  1/36	
Together they will do 		  1/ 9		of the job in one hour	
For 1 job they will take 9	hours