Langkah pengerjaan tertera di gambar yaa
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Langkah pengerjaan tertera di gambar yaa
Luas permukaan gabungan
= 5 x s x s + 2(pl + lt + pt) - s x s
= 5 x 5 x 5 + 2(13x6 + 6x5 + 13x5) - 5 x 5
= 125 + 2 x (78 +30 + 65) - 25
= 125 + 2 x 173 - 25
= 446 cm^2