30' x 30' = 900 square feet.
325.8932 sq meters
This you may determine for yourself, by measuring the area of floor mats; both front and back; in your car, or in a neighbour's car.
3412.159 sq ft
96 square meters, or 96 m2
The area of the ceiling is 368 square feet. The area of the floor is also 368 square feet. In order to find the area of the walls, we need to know the floor-to-ceiling height of the room.
It is suitable for measuring an area, that's not so big. You can use it if you have like 10 plates for your floor, which are 10x15 cm, and you need to count out how many of these are needed to fit your floor's size.
Gyms come in all sizes. The area of the floor is found by measuring the length by the width. A typical high school basketball court is 84 by 50 so the gym floor might be 90 by 60 or 5400 square feet.
floor is different...
This is calculated by measuring from the internal wall surfaces and includes all stairwells etc. The treated floor area would be this area minus any unheated areas. Residential property covers everything from a 1 bed flat to a 5 bed detached house so there is no typical.
You use the net floor area which is the area minus the space required for circulation and services
You have to multiply the two dimensions to get the area. In this case the answer will be 550 square feet.