SOLUTION: horatio travels 20 miles to the mall at 36mph but returns back to school in 15 minutes. how fast did he drive back to school?

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Question 581284: horatio travels 20 miles to the mall at 36mph but returns back to school in 15 minutes. how fast did he drive back to school?
Answer by Alan3354(69443) About Me  (Show Source):
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horatio travels 20 miles to the mall at 36mph but returns back to school in 15 minutes. how fast did he drive back to school?
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20 mi/15 mins = (4/3) miles per minute