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rumusnya:
L= 2 x {(p x l) + (p x t) + ( l x t)}
jwbnnya 944. karena g ada, jwb d sja mungkin salah cetak
luaqs = 2 (pxl + pxt + lxt)
= 2 ( 16x10 + 16x12 + 10x12)
= 2 ( 160 + 192 + 120)
= 2 ( 472)
= 944 cm²