Solution:
Given height of the circular cylinder, h = 10 cm
Diameter of circular cylinder = 4.5 cm
So radius, r = 4.5/2 = 2.25 cm
Volume of circular cylinder = r2h
= ×2.252×10 = 50.625 cm3
Base diameter of circular disc = 1.5 cm
So radius, r = 1.5/2 = 0.75 cm
Height of the circular disc, h = 0.2 cm
Volume of circular disc = r2h
= ×0.752 ×0.2
= 0.1125 cm3
Number of circular discs made from cylinder = 50.625/0.1125 = 450
Hence the number of circular discs made from cylinder is 450.