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maka rA=6, rB=3, rC=2
tA=tB=tC=t
rumusnya sama πr²t yg beda cuma r, πt dipancung.
VA:VB:VC
(6)²:(3)²:(2)²
36:9:4
Jadi perbandingan VA:VB:VC=36:9:4
VA:VB=36:9=4:1
VA:VC=36:4=9:1
VB:VC=9:4