Question

A cylindrical piece of iron pipe is shown below. The wall of the pipe is 0.75 inch thick, and the pipe is open at both ends.

What is the approximate inside volume of the pipe?

398 cubic inches

603 cubic inches

565 cubic inches

412 cubic inches

Answer 1

radius of outer cylinder: 8/2 = 4

radius of inner cylinder: 4 - 0.75 = 3.25

Answer 2

Volume of inner cylinder

V = pi*r^2*h

V = pi*(3.25)^2*12

V = ???

Answer 3

it would be 398, right? @jim_thompson5910

Answer 4

if you round to the nearest whole number, yes

Answer 5

so that would be my answer for the problem?

Answer 6

yes