Area of a circle?

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Area of a circle?
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dougal

Joined: 15 Jan 2005
Posts: 7184
Location: South Kent

Posted: Thu May 11, 06 11:46 am Post subject:

Northern_Lad wrote:

sean wrote:

Didn't one of the states of the US decide that pi was 4 at one point because it made sums easier?

I think they went with 3, because that's what it says in the Bible.

... well, to the nearest Cubitt...

Jb

Joined: 08 Jun 2005
Posts: 7761
Location: 91� N

Posted: Thu May 11, 06 11:46 am Post subject:

dougal wrote:

JB wrote:

... I used to be able to get away with the assumption pi = 1!. Well it was often close enough to show something wouldn't work and made the maths a lot easier.

Oh come on! Multiplying and dividing by 3 isn't that hard, really!

... that's easy for you to say on thursday, try again on a friday afternoon

vickersdc

Joined: 07 May 2006
Posts: 247
Location: Surrey / Hampshire Border.

Posted: Thu May 11, 06 1:50 pm Post subject: Re: Area of a circle?

tahir wrote:

What's the area of a circle with a 3.66mtr diameter?

Thats nearly half a perch in old money isn't it?

Rob R

Joined: 28 Oct 2004
Posts: 31902
Location: York

Posted: Thu May 11, 06 1:59 pm Post subject:

tahir wrote:

dougal wrote:

you could find 20 1tonne (1m cube) IBC's @ �40 each in quantity ...

But then you'd have to link em all up.

Just had another thought. what if we break up the old slab and use that as a base for the new? It'd be more expensive but then it'd be a more "proper" job wouldn't it?

I'd go along with that idea.

And as for IBC's, I don't know where exacly this tank will be going, but a load of them could look quite unsightly, take more cleaning, filling & emptying & may be an issue for the planners (

)

tahir

Joined: 28 Oct 2004
Posts: 45709
Location: Essex

Posted: Thu May 11, 06 2:02 pm Post subject: Re: Area of a circle?

vickersdc wrote:

Thats nearly half a perch in old money isn't it?

Come again? I'm not thinking of fish farming but now you mention it...

tahir

Joined: 28 Oct 2004
Posts: 45709
Location: Essex

Posted: Thu May 11, 06 2:03 pm Post subject:

Rob R wrote:

tahir wrote:

Just had another thought. what if we break up the old slab and use that as a base for the new? It'd be more expensive but then it'd be a more "proper" job wouldn't it?

I'd go along with that idea.

Got someone coming to price it on Saturday

dougal

Joined: 15 Jan 2005
Posts: 7184
Location: South Kent

Posted: Thu May 11, 06 2:07 pm Post subject:

Rob R wrote:

.. And as for IBC's, I don't know where exacly this tank will be going, but a load of them could look quite unsightly, take more cleaning, filling & emptying & may be an issue for the planners (

)

Well, its for tempoary storage of irrigation water, so I can't see that cleaning is an issue.
But yes, it'd depend on the local landscaping as to whether a low line of small tanks would look better or worse than a big tall steel tank.

dougal

Joined: 15 Jan 2005
Posts: 7184
Location: South Kent

Posted: Thu May 11, 06 2:09 pm Post subject:

tahir wrote:

Got someone coming to price it on Saturday

Isn't that price going to depend on the (unknown) concrete thickness?

I still think that discovering that has to be a sensible move.

tahir

Joined: 28 Oct 2004
Posts: 45709
Location: Essex

Posted: Thu May 11, 06 2:14 pm Post subject:
How would you connect the IBCs?

dougal

Joined: 15 Jan 2005
Posts: 7184
Location: South Kent

Posted: Thu May 11, 06 2:23 pm Post subject:

If they were on a similar level (eg lined across your slope) using some flex hose into a simple pvc pipe acting as a manifold - so that they all filled and emptied together.
The manifold has to be sized to suit the irrigation pump's flowrate needs.
It only gets complicated when they are at different levels...

EDIT: PS, they wouldn't even need to be on the concrete. You might have a better place for them...

tahir

Joined: 28 Oct 2004
Posts: 45709
Location: Essex

Posted: Thu May 11, 06 2:33 pm Post subject:
I'm not with you, how do they fill each other up if they're at the same level?

Northern_Lad

Joined: 13 Dec 2004
Posts: 14210
Location: Somewhere

Posted: Thu May 11, 06 2:39 pm Post subject:

tahir wrote:

I'm not with you, how do they fill each other up if they're at the same level?

If they all had openings at the bottom then you'd get them all filling up/emptying at the same time.

You could have a go at this with randomly palced vessels, sell it to the Tate, and buy a larger estat with the proceeds.

tahir

Joined: 28 Oct 2004
Posts: 45709
Location: Essex

Posted: Thu May 11, 06 2:41 pm Post subject:
Gotcha.

Nick

Joined: 02 Nov 2004
Posts: 34535
Location: Hereford

Posted: Thu May 11, 06 5:24 pm Post subject:
I know this won't help, but how about buying an old tanker/bowser? It's on wheels, so you can move it when you need to.

Nick

Joined: 02 Nov 2004
Posts: 34535
Location: Hereford

Posted: Thu May 11, 06 5:25 pm Post subject:

Northern_Lad wrote:

You could have a go at this with randomly palced vessels, sell it to the Tate, and buy a larger estat with the proceeds.

Been done.
https://forum.downsizer.net/viewtopic.php?p=173530#173530

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