An hour is a unit of time. A mile is a unit of distance. Without a unit of speed to connect the two, the two units are incompatible with each other.
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2 miles per hour
Assuming the question is asking for your speed in miles per hour (MPH) if you run 8 miles in 2 & 1/2 hours, divide miles by hours: 8 miles divided by 2 & 1/2 hours = 8 miles/2.5 hours = 8/2.5 MPH = 16/5 MPH = 3.2 MPH
16 miles in 1/2 hour means 32 miles in a whole hour.
Average speed of Cheetah = 60 mph(miles per hour) Since 30 minutes is half and hour you will halve 60 by half. 60 mph = 1 hour 60/2 = 30 mph Answer - The cheetah can run up to 30 miles a hour (if he maintains the speed of 60 miles a hour).
84 miles18 miles/hour * 3 hours = 54 miles15 miles/hour * 2 hours = 30 miles54 miles + 30 miles = 84 miles