GAUSS8 2019 Problem 8

Past Contests GAUSS8 2019
1

The circumference of a circle is 100. The diameter of this circle is equal to

Answer Choices
A. 100 \times \pi
B. \frac{2 \pi}{100}
C. \frac{100}{\pi}
D. 2 \pi \times 100
E. \frac{\pi}{100}