Cups to Tons!

Questions and answers on how to convert things from one unit or system to another

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Cups to Tons!

Postby Guest » Tue May 24, 2005 8:45 am

I'm faced with an interesting challenge:

How to estimate how much sand would need to be purchased to make 35,000 lumenarias for a battlefield illumination event.

Assuming that each takes 3 cups, that would be 105,000 cups of sand . . .

My question is how to convert that to

- x amount of 50 pound bags
- X tons of bulk sand

Any suggestions appreciated!
secondmdus@att.net
Guest
 

Postby Guest » Tue May 24, 2005 6:36 pm

The density of sand varies all over the place, depending on whether coarse/fine, loose/packed, dry/wet. This site,
http://www.powderandbulk.com/resources/ ... hart_s.htm
gives values from 96-130 lb/ft^3. I'll use 110 lb/ft^3

A cup is 1/16 of a gallon which is 231 cubic inches

so 105000 cups x 231/16 in^3/cup x 1 ft^3/1728 in^3 = 877.3 ft^3

877.3 ft^ x 110 lb/ft^3 x 1 ton/2000 lbs = 48.25 tons.
Guest
 


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