Given:
The circumference of each tent, C=188.4 ft.
Since the tent is circular in shape, the expression for the circumference of the floor of each tent is,

Put C=188.4 ft in the above equation to calculate the radius r.

Now, the area of the floor of each tent is,

Therefore, the radius of the floor of each tent is 30 ft and the area is 2827.4 sq.ft..