Jawabanmu

2014-06-01T11:37:47+07:00
Misal rusuk kubus 1 = x, rusuk kubus 2 = y
x - y =3
6x² - 6y² =234
6(x² - y²) = 234
(x-y)(x+y) = 39
3(x+y) = 39
x + y = 13

eliminasi
x + y = 13
x - y = 3
27 = 10
y =5 -----> x = 8
selisih volume = 8³ - 5³
= 287 dm³