A spherical ball was cut into eight equal pieces along the same axis (as shown in figure). The total surface area of the

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A spherical ball was cut into eight equal pieces along the same axis (as shown in figure). The total surface area of the eight pieces is how much more, in square units, than the original surface area of the spherical ball? [ The surface area of the sphere = 4ΠR2]
(1) The diameter of the spherical ball = 10 units.
(2) The total surface area of eight halves is 3 times that of the original surface area.


OA A

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