There's no way to tell.
There are 80*80 = 6400 sq feet.
1 sq yd = 9 sq ft 80 sq yd = (80 x 9) = 720 square feet
20ft*4ft = 80 sq ft = 80/9 sq yards = 8.88... sq yards.
75 x 80 = 6,000
80 decimal = 34848 sq feet approx.
= 40 x 80 = 3200 sq feet
9 sq ft = 1 sq yd so 80 sq ft = 80/9 = 8.88... sq yards.
40 ft × 80 ft = 3200 sq ft
80 sq ft
861.11 square feet.
350 kg per sq m = about 71.69 pounds per sq feet.
35 inches x 80 inches = 35/12 feet x 80/12 feet =( 35/12) x (80/12) sq ft