Question

A metal cylindrical disc is 3 cm thick and its
external diameter is 14 cm. If its height is
5 cm, find its volume and total surface area.​

Answer 1

Answer:

Step-by-step explanation:

inner diameter=14-6=8

radius=4

volume=π(7^2-4^2)h

= 22(49-16)*5/7

=22*33*5/7

=518.57cm3

total surface area=2π(R+r)(h+R-r)

= 2*22*(7+4)(7+5-4)/7

= 2*22*11*8/7

=553.14cm2