//EXAMPLE 1-53         PG NO-46-47
R1=200;                //RESISTANCE
R2=50;
R3=30;
R4=20;
Rab=[R1*(R2+R3+R4)]/(R1+R2+R3+R4);                //equvalent    resistance
disp('i)RESISTANCE = '+string (Rab)+' ohm')