Bantu jawab ya kak kalo salah report ya ☺️ agak cepet ya kak​

Jawaban:

Lp = 2(p x l + p x t + l x t) – (p x l)

Lp = 2(30 x 15 + 30 x 20 + 15 x 20) – (30 x 15)

Lp = 2(450 + 600 + 300) – 450

Lp = 2(1.350) – 450

Lp = 2.700 – 450

Lp = 2.250cm²