What is the radius and diameter of the following circle:16 cmRadiuscmDiametercm

In the picture they are showing you that the radius is
[tex]r=16\operatorname{cm}[/tex]and we know that the diameter is:
[tex]\begin{gathered} D=2r \\ D=2(16) \\ D=32\operatorname{cm} \end{gathered}[/tex]