First off, we neee to convert the units:
1 miles = 5280 feet
1 hour = 60 minutes
In this case:
60 miles = 5280×60 = 316800 feet
1 hour = 60 minutes
To find the answer, which is the speed,”we divide the length by it's time:
![(316800)/(60) \\ = \ ( \ 5280* 60)/(60) \\ = 5280](https://img.qammunity.org/2019/formulas/mathematics/high-school/e0g2bync2pshh1fv3ralip0pgepq8fjsdt.png)
Therefore the answer is C. 5280 ft/min.
Hope it helps!