Circumference
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To find the area of the concrete border, we first calculate the total area of the pool including the border and then subtract the area of the pool itself. The total length of the pool with the border is 30m (25m + 2.5m on each side), and the total width is 15m (10m + 5m on each end). Therefore, the total area of the pool with the border is 30m x 15m = 450 square meters. The area of the pool itself is 25m x 10m = 250 square meters. Thus, the area of the concrete border is 450 square meters - 250 square meters = 200 square meters.
you have to count the area around it!
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Well, honey, if the whole shebang is 144 sq ft and the border is 2 ft wide all around, that means the actual hot tub is 140 sq ft. So, if you take the square root of 140, you'll find that each side of the hot tub itself is around 11.8 feet long. Hope that helps, sugar!
It is called perimeter.