To find second side of park we can use formula for area of rectangle.
ITs
A=ab
Where A is area and a ,b area sides of it/
We can convert our area
A=ab /:a divide both sides by a (its no matter which side we assume to be 83)
\(\frac{A}{b} =a\)
Now we can substitute to our formula.
\(a= \frac{6889}{83}=6889:83=83\) - its second side and its our answer.