



 
Jacques, You didn't send a drawing of the cross section but I expect it looks like this. (Mine only has 5 tiers.) The volume of concrete needed is the area of the cross section times the length of the stand which is 150 yards. To find the area of the cross section I would draw a second copy, and then turn it 180 degrees and put it on top of the first copy. What is the area of this rectangle? Penny  


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