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The number of π* $r^{2}$ units in the surface area of a full sphere is:

Class 9Surface Area of a SphereMensuration

A4
B2
C3
D1

Step-by-Step Solution

4*π*

r^{2} = 4

times π*

r^{2}

, so the surface area equals 4 circles of the same radius.

Answer: A) 4

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