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90×90×90=72.9000cm³
Luas=
6×90×90=48.600cm²
panjang 1 rusuk = 90 : 12 = 7,5 cm
volume=(7,5)³=7,5 x 7,5 x 7,5=421,875cm³
luas permukaan=6 x 7,5 x 7,5 = 337,5 cm