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Mata Pelajaran : MatematikaMateri : Bangun ruang
Luas permukaan Balok :
2 x ( pxl + lxt +pxt )
2x ( 120 x 45+ 45 x 190 + 120 x 190)
2 ( 5.400 + 8.550 + 22.800 )
2 ( 36.750)
= 73.500 cm2