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Volume kubus = R ^3
maka
729 = r^3
akar pangkat 3(729) = r
9 = r
rusuk = 9 cm
Luas permukaan kubus
= 6 x (rusuk x rusuk)
= 6 x (9 x 9)
= 6 x (81)
= 486 cm^2
Jadi jawabannya :
= 486 cm^2
729 = s³
∛729 = s
s = 9