tolong jwb pake caranya pliss besok dikumpul

Lp = 2 × ((p.l) + (p.t) + (l.t))
Lp = 2 × ((18.12) + (18.8) + (12.8))
Lp = 2 × (216+144+96)
Lp = 2×456
Lp = 912 cm^2 (C)

Semoga membantu
Maaf kalau salah