Around 4, give or take 100kg or so.
32ft 6in
80ft x 50ft = 80 x 50 = 4,000 (square feet).
0.18365473 acres
48 16
4 ft * 8ft = 32ft
8 x 80 = 640 ft2.
32 (feet) * 12 * 25.4 / 1000 = 9.7536 metres (exactly)
160' X 80' is, 29.384% of one acre.
6
32ft/hr = 256yd/day
For this area you will need 2.4 cubic yards.
32 feet X 16 feet = 512 square feet.