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ukuran kotak = 8 cm
6 cm
0,05 m = 5 cm
maka :
Luas kain = 2 x (8x6 + 8x5 + 6x5)
= 2 x (48 + 40 + 30)
= 2 x 118
= 236 cm²
2x(8x6+8x5+6x5)
2x138=276 cm persegi