Question 1002869
Painting the chair		1 job			
Kimberly	45	minutes			
She does	  1/45	job in 1	minute		
Arthur	30	minutes			
He does	  1/30	of thejob in 1	minute		
Together they will do		  1/45	+	  1/30	+
Together they will do		  1/18		of the job in one minute	
So they will take		18      	minutes	


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