Circumference of a circle is 97inches
[tex]circumference=2\times\pi\times\text{ r}[/tex][tex]\begin{gathered} 97\text{ = 2 }\times\frac{22}{7\text{ }}\times r \\ 97\text{ }\times\text{ 7 = 44 }\times r \\ \frac{679}{44}=\text{ r} \\ r\text{ = 15.}4318 \\ \text{Diameter = r x 2 = radius x 2 =15.4318 x 2 =30.8636 inches} \end{gathered}[/tex]