The width is basically the diameter:
Given
Diameter = 5.5 cm
So Radius =
= 
= 2.75 cm
Height of cylinder = 12.5 cm
Formula of the volume of a cylinder
V = Area of base × height of prism
=
r² × h
=(2.75)² () × 12.5
=7.5625 × 12.5
≈ 296.83 cm³
Given
Diameter = 5.5 cm
So Radius =
Height of cylinder = 12.5 cm
Formula of the volume of a cylinder
V = Area of base × height of prism
=
=(2.75)² (
=7.5625
≈ 296.83 cm³