Question

A cylindrical piece of iron pipe is shown below. The wall of the pipe is 1.25 inch thick.



What is the approximate inside volume of the pipe?

88 cubic inches

49 cubic inches

142 cubic inches

154 cubic inches

Answer 1

\[Volume \space of \space a \space cylinder=\pi r^2 * h \]

Answer 2

i got 452.16

Answer 3

did you square the radius or the diameter?

Answer 4

radius so 3^2

Answer 5

yes but thats the outside radius...

Answer 6

we want to use the inside radius

Answer 7

you have to account for the thickness of the pipe

Answer 8

so 6-1.25 = 4.75/2=2.375^2?

Answer 9

so then whats this