Question

The radius of sphere is rcm it is divided into two equal parts. Find the whole surface of two parts

Answer 1

radius= r cm
after dividing the sphere it will split into 2 hemispheres
the surface area will be equal two twice the
TSA of hemisphere
=3pie r^2×2
=6pie r^2

Answer 2

Whole surface area of each part :-

$\bf\huge 2\pi r^2 + \pi r^2$

= $\bf\huge 3\pi r^2$

Total surface area of two parts :-

$\bf\huge 3\pi r^2$ +  $3\pi r^2$

= $\bf\huge 6\pi r^2$