There is no such unit as "square acre". The problem will be worked using simply "acres".
(70 acres) x (43,560 sq-ft per acre) x (10 ft) / (27 cubic ft per cubic yd) = (1,129,333 and 1/3) cubic yds
(10 acres) x (43,560 square ft per acre) = 435,600 square feetVolume = (435,600 sq ft) x (5 ft) / (27 cubic ft per cubic yard) =80,666 and 2/3 cubic yards
62/3 cubic yards for every 1-foot deep. 5 cubic yards for every 9-inches deep. 31/3 cubic yards for every 6-inches deep. 5/9 cubic yard for every 1-inch deep.
1 foot = 1/3 yard(440 x 1/3) = 146 and 2/3 cubic yards
1 cubic yard = 27 cubic feet1 acre = 43,560 square feetVolume = (6 x 43,560) x (3) = 784,080 cubic feet = 29,040 cubic yards
420
5.6 acres*3.5ft = 27104 sq yards*1.166... yards = 31621.33... cubic yards.
3,495.6 cubic yards.
Three acres three inches deep is 403.33 cubic yards.
100 acres = 100*4840 = 48400 sq yards 100 acres*50 feet = 48400*50/3 cubic yards = 8,066,666.66... cu yards.
1,000,000 cubic yards.
(10 acres) x (43,560 square ft per acre) = 435,600 square feetVolume = (435,600 sq ft) x (5 ft) / (27 cubic ft per cubic yard) =80,666 and 2/3 cubic yards
62/3 cubic yards for every 1-foot deep. 5 cubic yards for every 9-inches deep. 31/3 cubic yards for every 6-inches deep. 5/9 cubic yard for every 1-inch deep.
13.1 cubic yards, approx.
1.851852 cubic yards
It takes 5.0926 cubic yards or 137.5 cubic feet.
162 cubic feet.
You will need 0.56 cubic yards of concrete.