Oh boy, this is a long one so hang onto your hats:
We're going to start by finding the area of the smaller circle (or pool) the formula for the area of a circle is pi x radius² and we're given the diameter, here's what we're gonna do:
take the diameter and divide it by 2:
20 ÷ 2 = 10
So now we have the radius and all we have to do is plug that into the formula:
10² = 100
(we're doing 3.14 for pi)
3.14 x 100 = 314
So the area of the smaller circle is 314ft²
Now we gotta do the bigger circle, and since we already have a radius, we can skip a step:
12² = 144
3.14 x 144 = 452.16
So the area of the bigger circle is 425.16ft²
But now we have to find the difference between the two areas:
425.16 - 314 = 138.16
So the larger pool occupies 138.16 more ft² than the smaller pool
