A spherical ball of radius 8 cm is to be divided into eight equal part
| A spherical ball of radius 8 cm is to be divided into eight equal parts by cutting it in halves along the same axis. Find the surface area of each of the final piece.
A. 128
B. 96
C. 144
D. 64
Right Answer is: B
SOLUTION
After being cut, the ball will have eights parts of equal volume and surface area.
Area of ACBD = 
Surface area of ball = 
= 32π
And DOCB is half circle, so its area = 
= 32π
Now, Surface area of each piece = Area of ACBD + 2 (Area DOCB) = 32π + 64π = 96π
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A spherical ball of radius 8 cm is to be divided into eight equal part