suatu tabung mempunyai diameter 21 cm.Jika tinggi tabung 14 cm,maka volumenya

d = 21 cm
r = 21 ÷ 2 = 10,5 cm
t = 14 cm

V = π × r² × t
= 22/7 × 10,5 × 10,5 × 14
= 4851 cm³

V =1/4 X pi X d² X t
V = 1/4 x 22/7 X 21 X 21 X 14
V = 1/4 x 66 X 21 X 14
V = 1/4 x 1904
V = 4851 cm³