40 fathoms is 240 feet.
40-feet deep
40 to 50 feet
27 inches deep.
On average, 40 feet.
A hole 40 inches deep by 12 inches wide has a volume of: 2.62 cubic feet.
100 x 40 = 4000 sq ft (4000ft2).
That depends on how deep you want the top soil! 5' X 8' = 40 square feet. If you want it 1' deep you would need 40 Cubic Feet, 3" deep you would need 10 cubic feet of top soil.
hi
17,953.2 gallons
Width of hole: 6510/(40*10.6) = about 15 feet to the nearest integer
It was 363 miles long, 4 feet deep, and 40 feet wide.
800 C feet