i. Given: r = 7 cm and h = 10 cm
To find: Curved surface area of cylinder and total surface area
Curved surface area of the cylinder = 2πrh
Total surface area of the cylinder:
The curved surface area of the cylinder is 440 sq.cm and its total surface area is 748 sq.cm.
ii. Given: r = 1.4 cm and h = 2.1 cm
To find: Curved surface area of cylinder and total surface area
Curved surface area of the cylinder = 2πrh
Total surface area of the cylinder = 2πr (h + r)
∴ The curved surface area of the cylinder is 18.48 sq.cm and its total surface area is 30.80 sq.cm.