Question 8 (i)
30 circular plates, each of radius 14 cm and thickness 3 cm are placed one above the another to form a cylinder solid. Find
(i) The total surface area.
Given, radius of a circular plate, r = 14 cm
Thickness of the circular plate = 3 cm
Thickness of 30 circular plates =30×3=90 cm
30 circular plates are placed one above the another to form a cylinder solid. Then,
(i) Total surface area of the cylindrical solid so formed
Hence, the total surface area of the cylinder solid is 9152 cm2.