570 square feet.
30 square meters = ~322.92 square feet.
30 feet x 30 feet = 900 square feet.
30 x 40 = 1200 square feet.
24 x 30 = 720 square feet.
30 acres = 1,306,800 square feet.
The answer depends on the units used for 30x30. There will be different answers for 30 mm x 30 mm, 30 metres x 30 metres, and 30 miles x 30 miles! There is no justification for assuming that the measures are 30 feet x 30 feet.
There are 180,000 feet in 30 nautical miles.
20' x 30' = 600 square feet.
30 inches by 10 feet = 25 square feet.
30 inches by 5 feet = 12.5 square feet.
30 feet x 30 feet = 900 square feet 900 square feet = 83.612736 square metres.