L = 2 × (p×l) + (p×t) + (l×t)
= 2 × (10×5) + (10×7) + (5×7)
= 2 × (50 cm + 70 cm + 35 cm)
= 2 × (120 cm + 35 cm)
= 2 × 155 cm
= 310 cm²
Jadi luas permukaan balok tersebut adalah
Maaf Jika Salah
Semoga Bermanfaat...
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L = 2 × (p×l) + (p×t) + (l×t)
= 2 × (10×5) + (10×7) + (5×7)
= 2 × (50 cm + 70 cm + 35 cm)
= 2 × (120 cm + 35 cm)
= 2 × 155 cm
= 310 cm²
'Kesimpulan
Jadi luas permukaan balok tersebut adalah
310 cm²
Maaf Jika Salah
Semoga Bermanfaat...