Answer :

[tex]Look\ at\ he\ picture.\\\\R=5cm\\\\V=\frac{4}{3}\pi R^3\\\\V=\frac{4}{3}\pi\cdot5^3=\frac{4}{3}\pi\cdot125=\frac{500}{3}\pi\approx\frac{500}{3}\cdot3.14\approx523.3\ (cm^3)[/tex]
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