plis kak no 3 dan 4 pake caranya....ya......

3.
V = ½ × a × t × T
V = ½ × 40 × 30 × 20
V = 40 × 30 × 10
V = 1.200 × 10
V = 12.000 cm³

4.
V = ½ × a × t × T
V = ½ × 40 × 60 × 80
V = 40 × 60 × 40
V = 2.400 × 40
V = 96.000 cm³

Maaf Kalau Salah