Diketahui tinggi tabung 12 cm dan jari- jari tabung 14 cm hitunglah luas permuakaan tabung tanpa tutup
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Jawaban:
[tex]L = 2\pi {r}^{} (r + t) - \pi {r}^{2} \\ = 2 \times \frac{22}{7} \times 14(14 + 12) - \frac{22}{7} \times {14}^{2} \\ = 44 \times 2 \times 26 - 44 \times 14 \\ = 88 \times 26 - 616 \\ = 2288 - 616 \\ = 1672 {cm}^{2} [/tex]
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