ANSWER :
2 miles per day
EXPLANATION :
In 1/8 day, they finished 1/4 miles of the road.
We just need to divide the work done by the time to get the rate :
[tex]\frac{1}{4}\div\frac{1}{8}[/tex]
Division can be expressed as multiplication by taking the reciprocal of the divisor.
That will be :
[tex]\frac{1}{4}\times\frac{8}{1}=2[/tex]
