No 4 dan 5 tolong donk, pake caranya

4. A. ρ = 10:10/15×10×5
=1/750 cm^3
=1/0,075 m^3
=13,3
c. ρ = 15:10/15×8×10
= 1,5/1200 cm^3
= 15/0,12 m^3
= 12,5
b. ρ = 10 :10/ 20×10×8
= 1/1600 cm^3
= 1/0,16 m^3
= 6,25
d. ρ = 15:10/10×10×10
= 1,5/1000 cm^3
= 1,5/0,1 m^3
= 15
Jadi, jawabannya D

5. ρ = 12 kg/12×10×15
= 12/ 1800
= 6666,66