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schepotkina [342]
3 years ago
5

Radius of a circular ground is 21m. Find.

Mathematics
1 answer:
trapecia [35]3 years ago
6 0

The circumference of a circle of radius r is

C=2\pi r

So, in your case, the circumference is

C=2\cdot \pi \cdot 21 = 42\pi

The circumference is actually the length of the "perimeter", so the answer to questions 1 and 2 looks the same actually

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