tolong banget yaa jawabb no 12,13,17,18.. pake caraa tlg ya urgentt

12.
Volume kubus = 3 × 9000 = 27.000 cm3

13.
Volume balok = 3 × 1000 = 3000 cm3

17.
t = 3/2 s

Volume
s^2 . 3/2 s = 768
s^3 = 512
s = 8

18.
Luas alas = 100 × 50 = 5000 cm2

Volume air = 200.000 cm3
5000 × 2/3 t = 200.000
t = 60 cm