"Andy Hall" wrote in message
news
On Thu, 20 May 2004 12:21:41 +0100, "Graeme"
wrote:

"Andy Hall" wrote in message
.. .

snip snip

For the pipework, guesstimate and treat it as a set of cylinders.
Add up the 15mm runs and the 22mm (and other sizes) in terms of length
(two legs remember). Multiply diameter by pi and by length to
determine the volume, remembering to get the decimal point in the
right place to determine litres.

Volume of a cylinder = pi * radius^2 * length (not; pi * diam * length).

At last I've managed to contribute something to this group, instead of
always asking!



You're absolutely right pi x d provides the circumference.

This was the deliberate mistake to make sure that people were paying
attention.

Well that's my story and I'm sticking to it. :-)

.andy



The radius squared multiplied by pi gives the area of a circle. Two times Pi
multiplied by the diameter give the circumference. Pi multiplied by 4 then multiplied
by the radius squared gives you the surface area of a sphere.

http://mathforum.org/paths/measurement/aos.html


---
http://www.basecuritysystems.no-ip.com

Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.687 / Virus Database: 448 - Release Date: 16/05/04