tolong bantu ya plis jawab pakai caranya

28. Volume = luas alas × tinggi
= (1/2×16×12) × 25
= (8×12) × 25
= 2400 cm^3
opsi D

29. Volume = phi×r^2×t
= 22/7 × (10,5)^2 × 20
= 22/7 × 110,25 × 20
= 6930 cm^3
opsi A