Question

will fan and medal!!

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?

88 cubic inches
49 cubic inches
142 cubic inches
154 cubic inches

Answer 1

Help

Answer 2

@welshfella @Hero @acxbox22 @LegendarySadist @prowrestler @Zale101 @xavierbo2 @campbell_st @vera_ewing @bubbleslove1234

Answer 3

Help

Answer 4

hello?

Answer 5

so the pipe has an outer diameter of 6 inches so radius 3 inches

an inner diameter of 6 inches - 2 x 1.25

so the inner diameter is 3.5 inches or radius 1.75 inches


so find the area of the inner circle and then multiply by the height of 16 inches

Answer 6

How do i find the area of the inner circle?

Answer 7

Im retarded im sorry

Answer 8

multiply. cause its area

Answer 9

so what do i multiply

Answer 10

well the area of a circle is

\[A = \pi r^2\]

and you have your radius

Answer 11

so substitute and calculate the area...

then multiply by the height

Answer 12

ok
sec

Answer 13

so A=3.14x1.75x 16?

Answer 14

well you need to square the inner radius...

Answer 15

so the inner radius is 9?

Answer 16

Im so incompetent

Answer 17

the area of the inner circle is

\[A = \pi \times 1.75^2\]

calculate the area then multiply by the height

Answer 18

I got 9.616 @campbell_st

Answer 19

that's ok for the area, now multiply by the height

Answer 20

153.86?

Answer 21

@campbell_st

Answer 22

lol its d thank you so much @campbell_st