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?

113 cubic inches

452 cubic inches

410 cubic inches

254 cubic inches

Answer 1

The image shows a diameter of 6 inches...so the radius is 3 inches. The question tells you that thickness of the wall is 0.75"...which means the radius of the inside is 0.75 inches less than 3 inches (which is 2.25 inches). Just calculate the volume using that value.

Answer 2

how do you calculate the volume?

Answer 3

\[V_{cylinder}=\pi r^2*height\]

Answer 4

Your final equation should look like:\[V=\pi 2.25^2*16\]

Answer 5

i got 254.34...is that right?

Answer 6

Perfect :)

Answer 7

thank you!

Answer 8

you're welcome, good luck