Question

The diameter of right circular cylinder is 28cm and it's height is 21 find curved surface area and total surface area and volume

Answer 1

radius=diameter/2

r=28/2

=14

curved surface area =2πrh

=2×3.14×14×21

=1846.32

Total surface area=curved surface area+2πr²

=1846.32+2×3.14×14²

=1846.32+1230.88

=3077.2