Answer:
The rate at which The Harper family cover the distance is 47.5 miles per hour .
Explanation:
Given as :
The distance cover by family while traveling = d =276.45 miles
The time taken to cover the distance = t = 5.82 hours
Let the rate at which they cover the distance = s miles per hour
Now, Speed =

Or, Speed =

or, s =

∴ s = 47.5 miles per hour
So, the speed = s = 47.5 miles per hour
Hence The rate at which The Harper family cover the distance is 47.5 miles per hour . Answer