Jawabanmu

2014-06-10T15:41:47+07:00
V kubus = V balok
sxsxs = pxlxt
10x10x10 = 12,5 x 10 xt
10000 cm³ = 125 cm² x t
t = 10000cm³ / 125 cm²
t = 80 cm
2014-06-10T15:43:47+07:00
Volume kubus = s³ = 10³ = 1000 cm ³
volume kubus = volume balok, jadi :
volume balok = p x l x t 
1000 = 12,5 x 10 x t 
t = 1000 / (12,5 x 10 )
  = 8 cm