hitunglah luas permukaan balok jika P=8, L=7, T=4

Diket

Panjang = 8 cm
Lebar = 7 cm
Tinggi = 4 cm

Ditanya = L permukaan balok..?
jawab

Lp = 2 [ (p × l) + (p × t) + (l × t) ]
Lp = 2 [ (8 cm × 7 cm) + (8 cm × 4 cm) + (7 cm × 4 cm) ]
Lp = 2 ( 56 cm² + 32 cm² + 28 cm² )
Lp = 2 ( 116 cm² )
Lp = 232 cm²

semoga membantu

Semoga membantu.....