Circumference of circle: 2*pi*10 = 62.832 cm rounded to 3 decimal places
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If your radius is 10cm the circumference is: 62.8 cm
Do note that the perimeter/circumference of a circle can be found using this formula: πD or 2πr. Hence, with the information given that the circle has a radius of 5cm, the circumference of the circle is: Formula = πD Diameter = Radius x 2 = 5cm x 2 = 10cm π = 3.14 (depending on what the question states π to be) Circumference of the circle = 3.14 x 10cm = 314cm
The circumference is 20 times pi or appromixately 62.8.
The circumfrence would double Example : C of 5 cm radius circle = 3.14 *2*5 C=3.14 C of 10cm radius circle = 3.14*2*10 C =62.8
The surface are of a cylinder whose radius is 10cm and height is 20cm is 1884.96cm2