clear
//Given
K=5
l=0.2
c=10**-9               //F
b=15.4
a=15
pd=5000                  //V

//Calculation
//
C=(K*l*c)/(41.1*log10(b/a))

//Result
printf("\n (i) The capacitance of cylindrical capacitor is  %0.1f *10**-9 F",C*10**9)
printf("\n (ii) The potential of the inner cylinder is equal to p.d. between two cylinders i.e potentila of inner cylinder is %0.3f  V",pd)