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04-11-2019
Mathematics

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The formula for the circumference of a circle is C = 2pi . Determine the circumference when the radius r is 10 cm. A. 100 approx cm C. 20 cm b. 20 pi cm d. 100 cm

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04-11-2019

Answer:b

Step-by-step explanation:

Circumference, C = 2pi×r

=2×pi×10

= 20pi cm

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