Nomor 40 tolong pake jalan nya ya!

Please, let me answer your question :)
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Mapel : Matematika
Tentang : Bangun Ruang
Pertanyaan yg diajukan : 1
Pembahasan :

Diketahui :
- Panjang (p) : 9 cm
- Lebar (l) : 7 cm
- Tinggi (t) : 16 cm

Ditanya :
- Luas Permukaan (LP)

- Cara :

LP = 2 x (pl + pt + lt)
LP = 2 x ((9 x 7) + (9 x 16) + 7 x 16))
LP = 2 x (63 + 144 + 112)
LP = 2 x 319
LP = 638 cm²

Jawaban : A

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Hopefully this is the best for you.

MAKE BRAINLY GREAT AGAIN!!!

Heil Manstein!

Luas permukaan balok = 2 × (p×l) + (p×t) + (l×t)
Jawab = 2 × (9×7) + (9×16) + (7×16)
= 2 × 63 + 144 + 112 = 2 × 319 cm2 = 638 cm2