Volume of a cylinder

Volume V = π x r² x h

with π (number pi) approximately equal to 3.14
Radius = r
Height = h

Example

Calculate the volume of a cylinder with radius r = 3 cm and height h = 9 cm
Volume V of the cylinder = π x r² x h ≈ 3.14 x 3² x 9 ≈ 254.34 cm³