Jawabanmu

2014-05-08T10:31:10+07:00
Luas permukaan kubus = 6s²
486= 6s²
s²= 486:6
s²=81
s= 9 cm

Volume kubus= s³ = 9³= 729 cm³ (B)

1 4 1
2014-05-08T10:35:20+07:00
 486 =  6s^{2}
 81= s^{2}
       9 = s
sxsxs 
9x9x9 =  729  cm^{3}