Answer:
The side length of the original field is 19 feet
Explanation:
Let the side of original square be x
Now we are given that A square field was enlarged by adding 5 feet to the length and width of the original field.
So, length of side of enlarged field = x+5
Area of new enlarged field =

We are given that the area of the enlarged field is 576 square feet
So,





Hence The side length of the original field is 19 feet