1. The problem statement, all variables and given/known data The plates of a spherical capacitor have radii 31.0 mm and 43.0 mm. What must be the plate area of a parallel-plate capacitor with the same plate separation and capacitance of 12.4pF 2. Relevant equations C=(epsilon*A)/d 3. The attempt at a solution 12.4*10^-12=(8.85*10^-12*A)/(.012m) so A=.0168m^2=1.68cm^2, which is incorrect?