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= 2(392+392+196) = 2x980 = 1.960cm² (a)
2. maka, panjang = 0,5 m ,lebar = 0,5m ,tinggi = 3m <=> maka luas permukaan balok = 2(pl+pt+lt) = 2((0,5x0,5)+(0,5x3)+(0,5x3)) = 2(0,25+1,5+1,5) = 2x3,25 = 6,5 m² <+> maka, kaleng cat yang dibutuhkan paling sedikit 7 kaleng (c)
{semoga membantumu} :D jadikan yang terbaik ya! :)