Answer:
10.2 minutes
Explanation:
We are told that one lap is 0.25 miles and it takes mary 5.1 minutes to run 2 laps.
This means mary runs 0.25 + 0.25 miles in 5.1 minutes
Therefore, time taken for running one mile is
[tex]\frac{5.1}{0.25+0.25}[/tex][tex]=10.2\min [/tex]