sebuah tabung berisi aie AB:BC 3:2 jika volume tabyng 785 cm³

v = phi x r2 x t
785 = 3,14 x 5 x5 x t
785 = 78,5 t
t = 785/78,5
t = 10 cm

AB = 3/(2+3) x 10 = 3/5 x 10 = 6 cm

volume air = 3,14 x 5 x5 x6
= 471 cm3