Matematika

Pertanyaan

mencari luas permukaan tabung jika diketahui tinggi dan jari jarinya

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1 Jawaban

  • Pakai rumus
    Lp = 2πr (r+t)

    yg duperoleh dr 2kali L O dan L slimut => 2πr² + 2πrt lalu difaktorkan jadi 2πr (r+t)

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