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r=23 mm
dit:
vb=?
jawab:
vb= 4/3 . . r3
vb= 4/3 . 3,14 . 23.23.23
vb= 4/3 . 3,14 . 12167
vb= 12,56 . 12167 / 3
vb= 152817,52 / 3
vb= 50939,173 mm3