Question

30 circular plates each of radius 14 cm and thickness 3 cm are placed one above the other to form a cylinder than solid find total surface area Volume of Cylinder formed

Answer 1

Answer:

Step-by-step explanation:

height of the cylinder formed by 30 circular plates = 3×30 = 90 cm

radius = 14 cm(same as of circular plates). By applying formula of cylinder.

TSA = 2πrh + 2πr²

= 2π×14×90 + 2π×(14)²

=7920 + 1232 = 9152 cm²

Volume = πr²h = π×(14)²×90 = 55440 cm