maths question....

[l3jog]

I have an indoor riding school measuring 20mts x 40mts, I need a new surface that is delivered by the ton - if I want a depth of 12cm +/- , please could some genius work out how much I need to order, I come up with a different amount every time, and I do need to be accurate. Thanks very much!

[factor-fiction]

If the depth is to be 12 cm then the volume of the stuff you need is 20 x 40 x 0.12m� . That is 96m�
But how are you then converting that to tons?
If you show us your calculation we can comment on it

[Pigletion]

1 cubic metre of water has a mass of 1000 kg (or a tonne (metric)). (couldn't do superscript!)

Are you doing tons or tonnes? What's the density of the surface? As depending on it's ratio to that of water, you can calculate how much you would need.

[l3jog]

thanks, I did manage to figure out the suare mts needed, its the converting into imperial tons that has me foxed - the product is rubber tyre chippings, but the recycling centre chap has no idiea about cubic metres and just keeps saying its delivered in tons.......

[Graham-W]

According to this website, http://www.pitchcare.com/shop/product/6648/182 /dunweedin-rubber-landscape-chips-500kg , 500kg of rubber chippings has a volume of 1.1 cubic meter. Therefore you would need about 45 tonnes.
Wow, that seems a lot. Still.....it is a large area.

[Graham-W]

Or use the calculator here. http://www.dunweedin.co.uk/products_landscape_ coverage.html .
It's calculating a depth of 4cm so you will have to multiply the result by three to get your 12 cm depth.

[l3jog]

Thanks everybody, the conversion web site was very good, basically I need around 32,000 kg........I think! Much appreciated

[sddsddean]

I drive an 8 wheel tipper truck and go to your sort of place all the time. You will probably have the tyre chips delivered in 8 wheelers, so thats 20 tonnes a time. Get 40 tonnes (2 loads). If its not enough you can order some more; if its too much just stockpile the excess, as I guarantee the horses will compact it, kick it out of the 'corral' etc.