Sebuah tabung memiliki jari jari 14 cm, tinggi 18 cm dan π = 22/7 , hitunglah : a.luas permukaan tabung b. Volume tabung

[tex]a. \: l = 2 \times \pi \times r \times (r + t) \\ \\ = 2 \times \frac{22}{7} \times 14 \times (14 + 18) \\ \\ = 2 \times 22 \times 2 \times 32 \\ \\ = 44 \times 64 \\ \\ = 2.816 \: {cm}^{2} \\ \\ \\ b. \: v = \pi \times {r}^{2} \times t \\ \\ = \frac{22}{7} \times {14}^{2} \times 18 \\ \\ = \frac{22}{7} \times 196 \times 18 \\ \\ = 22 \times 28 \times 18 \\ \\ = 11.088 \: {cm}^{3} [/tex]