Question

Question 2 (i)
Find the surface area of a sphere of diameter:

(i) 14cm $[Assume\pi =\frac{22}{7}]$

Answer 1

Radius (r) of the sphere $=\frac{Diameter}{2}=\left(\frac{14}{2}\right)cm=7cm$
Surface area of sphere $=4\pi r^2$
$=(4\times \frac{22}{7}\times (7{)}^2)c{m}^2=616c{m}^2$