Question

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

Answer 1

What is the approximate inside volume of the pipe? (5 points)
Select one:
a. 88 cubic inches
b. 49 cubic inches
c. 142 cubic inches
d. 154 cubic inches

Answer 2

do i have to use the volume formula

Answer 3

area of a circle multiplied by height, is how you get a volume of a cylinder

Answer 4

Use that

Answer 5

The space you have to measure is a cylinder.
Its height is the same as the height of the pipe, 16 inches.
Its diameter =inner diameter of pipe
      = outer diameter of pipe - thickness of walls at each end of diameter
      = 6 - 2×1.25
      = 3.5 inches
radius r = 1.75 inches

A cross-section of the cylindrical space is a circle.
area of circle = πr² = 3.0625π in²

volume = area of circle × height
   = 3.0625π×16
   = 49π
   ≅ 154 in³

Answer 6

thnx

Answer 7

Anytime.

Answer 8

Hope you understood that.