A cylindrical capacitor consists of two coaxial cylinders with lengths of 20 cm and radii of 1.8 cm and 1.82 cm, respectively. The outer cylinder is grounded. What is the net capacitance of the system?
A) 4πε₀ cm
B) 2πε₀ cm
C) πε₀ cm
D) 0.5πε₀ cm