What is the square footage of a 48' round slab?

Answer 1

Alright, well, a few clarifications will be needed, but I'll work under the assumption of both.

Is it 48' around, or 48' across?

If it is 48' around, we need to find the Radius of the circle.

48 = pi x d

48 = 3.1415 d

therefore

d = 48 / 3.1415

d = 15.2793

r = 7.6396

Now with that, we can use the radius to define the area. with Area = PIr^2

so it would be : 3.1415 x 7.6396 x 7.6396 = 183.3543

It would have an area of 183.3543 square feet. (Assuming its 48' around)

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Now for the easy part. If the slab is 48' across, we simply take half of 48 as the radius.

3.1514 x 24 x 24 = 1809.54

So if the slab is 48' across, it'd have an area of 1809.54 square feet