by Caud » Thu Apr 19, 2007 7:10 am
30 x20x .415 / 27 = 9.22 cubic yards
Brake down for inches to 10ths divide 10 by 12 this will convert into 10ths times your inches thickness desired. (Apx.)
1" = .083
10/12=.83
.083x5 = .415
lenght x Width x Thichness
20 x 30 x .415