clear
//Given
R=20.0                   //K ohm
R2=1                     //K ohm

//Calculation
Vr=(R*R2)/(R+R2)

//Result
printf("\n (i) Voltmeter resistance is %0.3f  K ohm", R)
printf("\n (ii) Voltmeter resistance is %0.3f  K ohm",R2)
printf("\n (iii) Voltmeter resistance is %0.2f  K ohm",Vr)