A cylindrical piece of iron pipe is shown below. The wall of the pipe is 1.25 inch thick: The figure shows a cylinder of height 16 inches and diameter 6 inches. What is the approximate inside volume of the pipe? (6 points) 88 cubic inches 49 cubic inches 142 cubic inches 154 cubic inches

  154 in^3

Step-by-step explanation:

Apparently, the outside diameter is 6 inches, so the outside radius is 3 inches. The inside radius is shorter by the wall thickness, so is 3 -1.25 = 1.75 inches.

The volume formula is ...

  V = πr^2·h = π(1.75 in)^2(16 in) ≈ 49π in^3 ≈ 153.94 in^3

The approximate inside volume is 154 cubic inches.

154 cubic inches

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