The answer depends on the units used for the measurements given in the question.
Multiply the two numbers to get square feet. This will give you 600 square feet.
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.
20' x 30' = 600 square feet.
30 inches by 5 feet = 12.5 square feet.
30 inches by 10 feet = 25 square feet.
30 feet x 30 feet = 900 square feet 900 square feet = 83.612736 square metres.
30 x 70 = 2,100 square feet.
30 x 60 = 1800 square feet