bukan bangun di atas titik-titik sentimeter kubik tinggi 45 cm jari-jari 21 cm

[tex]v = \pi {r}^{2} t \\ \: \: \: = \frac{22}{7} \times 21 \times 21 \times 45 \\ \: \: \: = 62370 \: {cm}^{3} [/tex]
[tex]keliling = \frac{22}{7} \times 42 \\ \: \: \: = 132 \: cm[/tex]
[tex]l = \pi {r}^{2} + (k \times t) \\ \: \: \: = (\frac{22}{7} \times 21 \times 21) + (132 \times 45) \\ \: \: \: = 1386 + 5940 \\ \: \: \: = 7,326 \:{cm}^{2} [/tex]