Jawabanmu

2014-05-18T21:29:18+07:00
Lp=6r^2
64=6r^2
r=(4/3).akar 6 cm
V=r^3={(4/3).akar 6}^3=(128/9)akar6
1 5 1
2014-05-18T22:35:39+07:00
Luas       = 64 cm^2
6xSxS    = 64cm^2
6xS^2      = 64 cm^2
6xS         = √64
6xS         =8 cm
S             = 8 : 6
S             = 4/3 cm  

V = S x S x S
V = S^3
V = 4/33
V = (4/3 X √6)^3
V= 128/9 √6 cm^3