Question

A cylindrical tube, open at both ends, is made of metal. The internal diameter of the tube is 10.4cm and its height is 25 cm. If thickness of the metal is 8mm everywhere, calculatd the volume of metal in the cylinder

Answer 1

just figure the difference between the outside and inside volumes:

V = πr^2 h, so you want

π(10.4+0.8)^2(25) - π(10.4^2)(25)
= 25π(11.2^2-10.4^2)
= 432π

Answer 2

704

Answer 3

Given ans by Steve is wrong