Volume tabung di samping adalah tinggi 20cm alas28cm​

Kalau Alasnya Diameter =

22/7 × 28 ×28 × 20 =

22 × 4 × 28 × 20 =

49.280 cm³

Kalau Alasnya Jari Jari

28 = 14 cm

22/7 × 14 × 14 × 20 =

22 × 2 × 14 × 20 =

12.320 cm³