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v2=4/3 π 2³ v2=4/3 π 8 v2=32/3 π(cm³)
V=V1+V2
V= 32/3π+256/3π V=288/3π V=96π(cm³)
96π=4/3 πr³ I :4/3
96π/ * 3/4=πr³
72π=πr³ I:π
r=∛72