Question

The radius of a sphere is $3.5$cm. Find the surface area and volume.

Answer 1

Radius of sphere$=3.5$cm$=R$

Surface area$=4\pi R^2$$=4\times \frac{22}{7}\times 3.5\times 3.5=154c{m}^2$

Volume$=\frac{4}{3}\pi R^3=\frac{4}{3}\times \frac{22}{7}\times 3.5\times 3.5\times 3.5$$=\frac{44}{3}\times (3.5{)}^2$

Volume$=179.66c{m}^3$

$\therefore$ Volume of sphere$=179.66c{m}^3$

Surface area of sphere$=154c{m}^2$.