The area of a square field is 325 m

The length of one side of the square field will be the square root of 325.

$\therefore \sqrt{325}=\sqrt{5 \times 5 \times 13}$

$=5 \times \sqrt{13}$

$=5 \times 3.605$

$=18.030$

Hence, the length of one side of the field is 18.030 m.