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Volume kubus = r^3
512 = r^3
r = 8 cm
Untuk kubus 3:
Volume kubus = r^3
125 = r^3
r = 5 cm
Tinggi kubus = r kubus, sehingga tinggi kubus = r kubus 1 + r kubus 2 + r kubus 3 = 8 + 8 + 5 = 21 cm