Question #N298
A circle has a diameter of 10 cm. What is the circumference of the circle?
A. 5\pi
B. 10\pi
C. 25\pi
D. 100\pi
Correct Answer is: B
The circumference of a circle is given by the formula C = 2Ï€r, where r is the radius. Since the diameter is 10 cm, the radius is 5 cm. Therefore, the circumference is C = 2Ï€(5) = 10Ï€ cm.