Given: Side of the Square = 10 m 
Ali is running along the boundary of the park.
This implies that the distance covered by him will be equal to the perimeter of the park.
Perimeter of a square = 4 $\times$ Side
$\Rightarrow$ Perimeter of the square park = 4 $\times$ 10 m
= 40 m
Distance covered by Ali in two rounds of the park = 2 $\times$ Perimeter of the park
= 2 $\times$ 40 m
= 80 m
Therefore, distance covered by Ali is 80 m.