Given that,
Length of rectangle = 13.6 meters
Breadth of rectangle = 3.4 meters
We know that,
Area of rectangle = Length × Breadth
= (13.6 × 3.4)
= 46.24 sq m
Therefore,
Area of the square = 46.25 sq m
Length of each side of the square = \(\sqrt{46.25}\)
Now, by using long division method we get:

\(\sqrt{46.24}\) = 6.8
Therefore,
The length of a side of the square is 6.8 meters