Without a second measurement of width, there is no way of knowing. Linear is length and square foot is area. You have to know length and width to figure it. 30 linear feet 1 foot wide would be 30 square feet.
The floor is 30 square feet.So is the ceiling.
Circumference (the number I assume you want) = Pi X D C = 3.14 x 30 C = 94.2 There are 94.2 linear feet in a 30 foot diameter circle.
Feet and linear feet are the same measurement. Therefore, 30 feet is equal to 30 feet.
A linear foot has no width, so no matter how many you have of them, you will never cover a 32 x 30 space.
Multiply the 30 by 30.48 (cm per linear foot) and you get 914.4 cm. 914.4 squared is 836127.36 cm2. Divide that by 10,000 (cm2 per m2) and your answer is 83.612736 m2.
There is no answer. Square feet are a measure of area. Linear feet are a measure of distance. They are totally different things. You can only convert between measures of the same thing, e.g. 1 square foot = 144 square inches and both are measures of area.
70' x 30' = 70*30 square feet = 2100 sq feet.
30 X 15 = 450 square feet.
60 x 30 = 1,800 square feet
about 30 linear feet
30/2 = 15 linear feet of material 2 feet wide. It is 8 feet long so you need 2 sheets