question: A cat eats nine sausages in 30 minutes. A dog can eat the same number of sausages in 2/3 the amount of time the cat takes. Calculate the average time the two take the eat the sausages.
answer: If the cat takes 30 minutes to eat the sausages, the dog takes 2/3*30 = <<30*2/3=20>>20 minutes.
  The total amount of time the cat and the dog take to eat the sausages is 20+30 = <<20+30=50>>50 minutes.
  The average time in minutes that the two take to eat the sausages is 50/2 = <<50/2=25>>25 minutes.
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