If, the radius of a sphere=r
Then,
1)CURVED SURFACE AREA OF SEMI(HEMI) SPHERE= 2πr2
2)TOTAL SURFACE AREA OF SEMI(HEMI) SPHERE= 3πr2
Ex;-
If,radius of a sphere=r=14cm
1)CURVED SURFACE AREA OF SEMI(HEMI) SPHERE= 2πr2
=2X(22/7)X14X14
=2x22X2x14
=1232cm2
2)TOTAL SURFACE AREA OF SEMI(HEMI) SPHERE= 3πr2
=3X(22/7)X14X14
=3x22X2x14
=1848 cm2