Explanation
We are given the figure of a circle with diameter 10.2 units.
We want to determine the value of the radius. This is done as follows:
[tex]\begin{gathered} Diameter=2\times Radius \\ 10.2=2\times Radius \\ Divide\text{ }both\text{ }sides\text{ }by\text{ }2 \\ \frac{10.2}{2}=Radius \\ Radius=5.1\text{ }units \end{gathered}[/tex]
Hence, the radius is 5.1 units. Option B is correct.
