tolong dong jawab ya yg nomor 2 dan 3 isi cara please

2. Vkubus = s × s × s
a. 216 = s^3
s = 216 akar 3
= 36 cm
b. 2167 = s^3
s = 2167 akar 3 = 13 cm
3. a. V kubus X = 18 × 18 × 18 = 5832 cm3
b. V kubus y = Vkubus x × 1/8 ×1/8 ×1/8 =5832 × 1/512 = 11,39 cm3
c. r = V akar3
Vz = Vx × 1/6 =5832 × 1/6 = 972 cm3
r = 972 akar 3