human
I run 12 miles in 90 minutes. What is my average speed in miles per hour?
assistant
How many hours are in 90 minutes? ** First convert 90 minutes to hours: 90 minutes / 60 minutes/hours = <<90/60=1.5>>1.5 hours.
How many miles do I run in 1 hour? ** In 1 hour, I run 12 miles / 1.5 hours = <<12/1.5=8>>8 miles/hour.
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