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= 94.2 (56)
= 5275.2cmpersegi
luas permakaan tabung tanpa tutup
= 3.14 × 30 (30+2.120)
= 9.42 (270)= 25434 cmpersegi
luas permukaan bandul= 25434 + 5275.2
=30709.2 cmpersegi