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Well, you would take the 7000 square feet of dirt and multiply it by the four inches of stone to get the 28000 cubic yards of stone. (28000 yds³)
2.37 cubic yards of stone for every 3 inches deep it needs to be
64 cuft, about 2 and a third cubic yards
25 Yards
6.67 cubic yards
It depends on how big the stone is.
Well, you would take the 7000 square feet of dirt and multiply it by the four inches of stone to get the 28000 cubic yards of stone. (28000 yds³)
2.37 cubic yards of stone for every 3 inches deep it needs to be
how many yards of dirt for a 1foot x 36 foot x 3inch trench
Take the sq foot and divide by 140 if you want the stone apx. 2" deep.
Between 70 and 100 yards (64-91 m) behind the front trench was located the support (or "travel") trench, to which the garrison would retreat when the front trench was bombarded. Between 300 and 500 yards (275-460 m) further to the rear was located the third reserve trench, where the reserve troops could amass for a counter-attack if the front trenches were captured.
64 cuft, about 2 and a third cubic yards
25 Yards
6.67 cubic yards
10 yards
4.093 cubic yards
10 yards.