hello
to solve this question, we simply need to substitute the values into the equation
we are asked to find the radius, but we have surface area
[tex]A=21.24m^2[/tex][tex]\begin{gathered} r=\sqrt[]{\frac{a}{4\pi}} \\ a=\text{surface area} \end{gathered}[/tex][tex]\begin{gathered} r=\sqrt[]{\frac{21.24}{4\pi}} \\ r=\sqrt[]{1.6902} \\ r=1.30m \end{gathered}[/tex]from the calculations above, the radius of the spherical ball is 1.30m
