The amount of leather needed to cover the baseball and the amount needed to fill it are respectively; 6.16 sq.in and 1.44 in³
We have diameter = 1.4
Thus, radius; r = 1.4/2 = 0.7 in
A baseball is spherical in shape. Thus;
Surface area of baseball is; A = 4πr.
Thus, the amount of leather required to cover the baseball is;
A = 4π * 0.7 = 6.16 sq.in
The amount of rubber needed to fill it is;
V = (4/3) * π(0.7)³ = 1.44 in³
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