The volume of cast iron pipe is 1053.19 in³.
The volume of a cylinder can be calculated by: [tex]\pi *r^2*h[/tex], where:
r = radius
h= height
In this question, the cylinder is represented for a pipe, where:
r = inner diameter= [tex]inner\;diameter=outer\;diameter-2*thickness[/tex]
h= length of pipe
From this, you should apply the volume of the pipe. See the steps:
inner diameter=outer diameter-2*thickness
inner diameter=8-2*0.6
inner diameter=8-1.2=6.8 in
[tex]V_{pipe}=\pi *r_{internal}^2*h\\ \\ V_{pipe}=\pi *(\frac{6.8}{2} )^2*29\\ \\ V_{pipe}=\pi *(3.4)^2*29=1053.19\;in^3[/tex]
The volume of cast iron pipe is 1053.19 in³.
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