Answer:
13.0 feet
Step-by-step explanation:
The circumference of a circle is given by the formula ...
C = πd . . . . . . where d represents the diameter
Then the diameter is ...
d = C/π = 40.82 ft/π ≈ 12.9934 ft
Rounded to the nearest tenth foot, the width of the room must be 13.0 ft.