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= 4/3 . 3,14 . 15 . 15 .15
= 14,130 cm^3
r= 15cm
Vbola: 4/3 x x
: 4/3 x 3.14 x 15 x 15 x 15
:4 x 3.14 x 5 x 15 x 15
:14130 r^3