50 feet.
on a wall it would be 100 square feet.
A 6 foot by 3 foot area would be 18 square feet.
A 2x12x12 foot board would not be measured in square feet but cubic feet and there would be 240 feet3
That would be 5026.55 square feet.
16 foot x 16 foot deck would be 256 square feet.
Ummm, would you believe 1200 square feet?
Multiply width by length to get the area. The answer would be 1800 square feet.
It would be a 20 by 20 ft square
300 square feet
225 square feet
340 square feet.
108 square feet