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Verified answer
P = 10 cml = 8 cm
t = 5 cm
Luas sisi balok
= 2(pl + pt + lt)
= 2(10 x 8 + 10 x 5 + 8 x 5)
= 2(80 + 50 + 40)
= 2 x 170
= 340 cm²
Jawaban D