Penjelasan dengan langkah-langkah:
Luas Permukaan
= luas balok tanpa tutup + luas prisma segitiga tanpa sisi tegak
= pl + (2×pt) + (2×lt) + (2 × (½×(12-6)×8)) + ((12-6) × 5) + (5 × 10)
= (8×5) + (2 × (8×6)) + (2 × (5×6)) + (2 × (½×6×8)) + (6×5) + (5×10)
= 40 + (2 × 48) + (2 × 30) + (2 × 24) + 30 + 50
= 40 + 96 + 60 + 48 + 30 + 50
= 324 cm²
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Penjelasan dengan langkah-langkah:
Luas Permukaan
= luas balok tanpa tutup + luas prisma segitiga tanpa sisi tegak
= pl + (2×pt) + (2×lt) + (2 × (½×(12-6)×8)) + ((12-6) × 5) + (5 × 10)
= (8×5) + (2 × (8×6)) + (2 × (5×6)) + (2 × (½×6×8)) + (6×5) + (5×10)
= 40 + (2 × 48) + (2 × 30) + (2 × 24) + 30 + 50
= 40 + 96 + 60 + 48 + 30 + 50
= 324 cm²
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