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There are six bays at an oil change shop. It takes 45 minutes to work on a car at each bay. Cars are coming every 6 minutes to the shop for an oil change. How long before cars start backing up? What kind of spacing is needed to maintain proper flow?

Correct result:

t2 =  36 min
s =  7.5 min

Solution:

n=6 T=45 min t1=6 min  t2=n t1=6 6=36=36 min  t2<T
   s=T/n=45/6=152=152 min=7.5 min



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