Question

Question 8 (ii)
30 circular plates, each of radius 14 cm and thickness 3 cm are placed one above the another to form a cylinder solid. Find

(iI) Volume of the cylinder so formed.

Answer 1

Given, radius of a circular plate, r = 14 cm
Thickness of the circular plate = 3 cm
Thickness of 30 circular plates $=30\times 3=90cm$
30 circular plates are placed one above the another to form a cylinder solid. Then,

(i) Volume of the cylinder so formed $=\pi r^{2}h$
$=\frac{22}{7}(14{)}^2\times 90=\frac{22}{7}\times 14\times 14\times 90$
$=22\times 28\times 90=55440c{m}^3$
Hence, the volume of the cylinder so formed is $55440c{m}^3$.