Mata Pelajaran : Matematika
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Selimut Tabung = K.T = 80
= π × r × t = 80
= π × r × t = 40
= π × r × r = 40 ( tinggi Tabung = 2 Jari Jari Lingkaran
π2r² = 40
Luas permukaan = 2πr² = 2 × 40 = 80
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Mata Pelajaran : Matematika
___________
Selimut Tabung = K.T = 80
= π × r × t = 80
= π × r × t = 40
= π × r × r = 40 ( tinggi Tabung = 2 Jari Jari Lingkaran
π2r² = 40
Luas permukaan = 2πr² = 2 × 40 = 80