Question

Find the surface area and volume of a bouch ball shown in figure.

Answer 1

Radius $=\frac{4.2}{2}=2.1cm$

Volume of sphere $=\frac{4}{3}\pi r^3=\frac{4}{3}\left(3.14\right){\left(2.1\right)}^3=38.7{cm}^3$

Surface area of a sphere $=4\pi r^2$

$=4\times 3.14\times {\left(2.1\right)}^2=55.3{cm}^2$