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→ sisi kubus 1 = ∛2197 = 13 cm
V Kubus 2 = 4096 cm³
→ sisi kubus 2 = ∛4096 = 16 cm
jadi, selisih pj.rusuk kedua kubus tsb adalah 3 cm
r2 = ³√ 4.096 = 16 cm
selisih = 16 - 13 = 3 cm