The radius of a sphere is rcm.It is divided into two equal parts.The whole surface areas of two parts will be?
Radius of a sphere = r cm
If the sphere is divided into two equal parts, then the resulting parts are hemispheres with radius r cm.
Total surface area of each hemisphere = 3πr2
Total surface area of both parts = 2 × 3πr2 = 6πr2
Hence, the whole surface areas of two parts is 6πr2.