Question

Find the surface area of a sphere of radius $1.4\text{cm}$. $(\pi =\frac{22}{7})$

Answer 1

Here, radius, $r=1.4cm$.
Total surface area of a sphere $=4\pi r^2$
$=4\times \frac{22}{7}\times 1.4\times 1.4$
$=24.64c{m}^2$
$\therefore$ The total surface area of the sphere is $24.64c{m}^2$