Area = pi*r2 where r = d/2 = 3/2 or 1.5 ft So area = 7.07 sq ft
3 sq yards = 3*9 sq ft = 27 sq ft
A circle with a 49 ft diameter would have an area of 1885.741 sq ft (to 3 dp)
There's no way to express area in feet - it needs to be square feet. A circle of radius 12" has an area of pi sq. ft. ~= 3.141 sq. ft. A circle of diameter 12" has area pi/4 sq ft ~= 3/4 sq. ft.
There are: pi*1.5 squared = 7.069 square feet rounded to 3 decimal places
There are: pi*3*3 = 28.274 square feet rounded to three decimal places
There are: pi*2 squared = 12.566 square feet to 3 dp
There are about 8.296 square feet rounded to 3 dp
130,680 sq ft
1 yard = 3 ft so 1 sq yard = 3 ft * 3 ft = 9 sq ft Then 4356 sq ft = 4356/9 = 484 sq yard
9 sq ft = 1 sq yd525 sq ft = 581/3 sq yd
1 yd = 3 ft 1 sq yd = 1 yd x 1 yd = 3 ft x 3 ft = 9 sq ft ⇒ 70 sq yds = 70 x 9 sq ft = 630 sq ft