MDPE hoop size??

[Lardman]

I was just testing you

I used d rather than r for the circumference calculation. r = d/2. 157/2 +40 = 118.5

I blame cadalot for not checking my maths.

[gardening_gal]

I thought I was getting it but then I got confused again. Sussed now though. Thanks again.

[veggiechicken]

Normally I put a link to a posting on my blog where I explain how to work this out will illustrations but since having my wrist slapped for doing so I no longer do that kind of thing

There is a link in your signature to your blog! If anyone wants to look, I'm sure they will.

[Cadalot]

There is a link in your signature to your blog! If anyone wants to look, I'm sure they will.

They did and it's so much easier to understand with the dimensioned drawings and formulae