Jawabanmu

2014-06-17T11:53:09+07:00
Diagonal ruang = akar(108) = akar(16.3) = 4akar(3)

diagonal ruang = s.akar(3)
4akar(3) = s.akar(3)
s = 4

V = s.s.s = 4.4.4 = 64
2014-06-17T11:56:32+07:00
Panjang diagonal ruang = s√3 
Sekedar informasi saja, panjang diagonal sisi kubus = s√3 = √(s² * 3)
Jika diagonal ruang √108 cm = 6√3 = 6
jadi panjang rusuknya 6cm. volume kubus=s³=6³=216 cm³