Re: Spare Tire Volume

["Randy B" <scirokn81@email.msn.com>]

Stephen,
I actually remembered these formulas from years ago, go figure (he he he). I
double checked them with my old pre-calculus book just to make sure though.
It is tapered if it is larger at the opening than it is at the bottom of the
tire compartment.


Stephen writes
>Where did you get those equations from. I recently took geometry and I am
>taking advanced algebra trig this year. So I can probably follow your
>formula. I am just wondering yhow you got it. Another Q, how do I know
>whether mine is tapered or not? Do you mean, by tapered, that it is bigger
at
>the top than at the bottom?



>In a message dated 2/23/00 8:08:48 PM Pacific Standard Time,
>scirokn81@email.msn.com writes:
>
><< Let me see if I remember my geometry, hmmmmmm.
> the volume of the spare tire compartment would be
>
> If it does not taper. (top opening and bottom plate
> are the same diameter) then:
>
> V= Pi*(r^2)*h
> Do math in brackets first
> * = mulitiplication
> V= volume in cubic inches, divide final answer by 1728 to get cubic feet.
> Pi= 3.1416
> r^2= radius of the circle squared (multiplied times itself)
> h= height
>
> If it does taper. (top opening is larger diameter than
> upper opening) then:
>
> V=(Pi/3)*h*[(r^2)+rR+(R^2)]
> Do math in inner brackets first then do outer brackets
> * = multiplication
> V=volume in cubic inches, divide final answer by 1728 to get cubic feet.
> Pi=3.1416
> h= height
> r^2= radius of the smaller circle squared (multiplied times itself)
> R^2= radius of the larger circle squared (multiplied times itself)
> rR= smaller circle times larger circle
>
> Hope this isn't too confusing, a math teacher I am not, just know
> how to do it is all. If you need help, just get me the measurements
> and I will tell you the volume.
>
> I used the second equation for the Mk1 spare tire compartment because it
> tapers and got 1.9 cubic feet.
>
> Randy B.
> Cosmos 81 Scirocco S - soon to be 2.0L 16V
> Mars 81 Scirocco S - t t 1847cc >>









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