Homework Help

A metal pipe has outer diameter 5mm and 3mm thick metal. Calculate the volume used to...

user profile pic

christiano-cr7 | Salutatorian

Posted June 28, 2013 at 9:49 AM via web

dislike 1 like

A metal pipe has outer diameter 5mm and 3mm thick metal. Calculate the volume used to make this metal pipe if the length of the pipe is 18cm long.

Tagged with cylinder, formula, math, maths, pipe, volume

1 Answer | Add Yours

user profile pic

durbanville | High School Teacher | (Level 1) Educator Emeritus

Posted June 28, 2013 at 10:26 AM (Answer #1)

dislike 1 like

To calculate, basically find the outer volume minus the inner volume:

`V=pir^2h`  becomes `V=pi h ((r_(1))^2- (r_(2))^2)`

First convert the cm into mm. Thus the length = 180mm.The thickness of the pipe is 3mm so the inner diameter (d) = 2mm 

If `d_1 = 5 therefore r_1=2.5`  and `d_2=2therefore r_2=1`

`V=pi times 180( 2.5^2-1^2)`

`therefore V=2968.81 mm^3`

Sources:

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes