What is the circumference of a circle with a diameter of 30 centimeters? A. 9.55 centimeters B. 47.1 centimeters C. 94.2 centimeters D. 188.4 centimeters
94.2 centimeters is the circumference of a circle with a diameter of 30 centimeters.
Solution:
C=2 r
d=2r
Solving for C
C= d= ·30 =94.24778 cm
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