volume bangun tabung memiliki diameter 20 tingginya 30cm

V = (phi) x r x r x t
    = 314/100 x 10cm x 10cm x 30 cm
    = 314 x 30cm
    = 9420 cm^3

v = π × r² × t
v = 3,14 × 10 × 10 × 30
v = 3,14 × 3000
v = 9420