SOLUTION: It takes Rachel 6 hours to decorate a wedding cake. It takes her assistant, Priscilla, 12 hours to complete the same job. How long would it takes to decorate the wedding cake if th

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Question 1131464: It takes Rachel 6 hours to decorate a wedding cake. It takes her assistant, Priscilla, 12 hours to complete the same job. How long would it takes to decorate the wedding cake if they work together?
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
1/6 + 1/12 = 1/4
It will take them 4 hours.