The diameter of a cylinder is 28 cm and its height is 40 cm. Find the curved surface area, total surface area and the volume of the cylinder.
Given,
Diameter of cylinder = 28 cm
Height of cylinder = 40 cm
Radius of cylinder =
∴ Curved surface area of cylinder = 2πrh = 2 × × 14 × 40 = 44 × 40 × 2 = 3520 cm2
∴ total surface area of cylinder = 2πrh + 2πr2 = 2πr(h + r) = 2 × × 14 × 54 = 88 × 54 = 4752 cm2
∴ Volume of cylinder = πr2h = × 14 × 14 × 40 = 24640 cm3