2013 UNCO Math Contest II Problems/Problem 7
Revision as of 17:22, 19 October 2014 by Timneh (talk | contribs) (moved 2013 UNC Math Contest II Problems/Problem 7 to 2013 UNCO Math Contest II Problems/Problem 7: disambiguation of University of Northern Colorado with University of North Carolina)
Problem
Suzie and her mom dry half the dishes together; then mom rests, while Suzie and her dad dry the other half.
Drying the dishes this way takes twice as long as when all three work together. If Suzie’s mom takes 
seconds
per dish and her dad takes 
seconds per dish, how long does Suzie take per dish?
