kak tolong bantu nomer 3 beserta caranya

s1 : s2 = 2 : 5 => s1 = 2x dan s2 = 5x
V2 - V1 = 936
(s2)^3 - (s1)^3 = 936
(5x)^3 - (2x)^3 = 936
125x^3 - 8x^3 = 936
117x^3 = 936
x^3 = 8
x = 2
Jadi panjang rusuk kubus II = s2 = 5x = 5(2) = 10 cm