Odpowiedzi

2010-03-01T18:16:55+01:00
V=4/3 pi r^2
972pi=4/3 pi r^2 /*3
2916=4r^2 / :4
r^2=729
r=27

P=4pi r^2
P=4*729pi
P=2916pi
+20%
P=3499,2 pi cm^2= 3499pi cm2

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