Mathematics[[1]] is the surface area of a sphere of radius: 10.5 cm.

[[1]] is the surface area of a sphere of radius: 10.5 cm.


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    Solution:

    The content of a circle with radius is  is . We can say that the surface area of ​​a sphere is 4 times the area of ​​a 2-dimensional circle with the same radius.
    Let us substitute 10.5 cm for r   in the formula.
    S.A=4π (10.5) 2  
    S.A=4× 22 7 × 105 10 × 105 10 S.A=1386  
    The surface area of a sphere with radius 10.5 cm is 1386 cm2.
     
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