Question

In this example given below, radius of base of a cylinder and its height are given. Then find the curved surface area and total surface area.

r = 4.2 cm, h = 14 cm

Answer 1

Given: r = 4.2 cm and h = 14 cm

To find: Curved surface area of cylinder and total surface area

Curved surface area of the cylinder = 2πrh

= 2 x \(\cfrac{22}{7}\)x 4.2 x 14 = 2 x 22 x 4.2 x 2

= 369.60 sq.cm

Total surface area of the cylinder = 2πr (h + r)

∴ The curved surface area of the cylinder is 369.60 sq.cm and its total surface area is 480.48 sq.cm.