



 
Hi Piero. I think there is something strange with the numbers you've sent me. If it is a 45 degree angle, the depth (15 ft) must match the distance out (20 ft), but 15 is not the same as 20. That would be about 37 degrees. There is an easy way to visualize this though. If you doubled the space exactly and rotated it around, you would have a rectangular box, whose volume (yards of dirt) is exactly twice what you need. So just punch those widths, depths and lengths into our volume calculator at http://mathcentral.uregina.ca/Volume and take half the answer. Cheers,  


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