clear
//
//
//

//Variable declaration
dm=1.98*(10**-29)*(1/3)      //dipole moment
l=0.92*10**-10        //bond length(m)

//Calculation
ec=dm/l        //effective charge(coulomb)

//Result
printf("\n effective charge is %0.2f  *10**-19 coulomb",ec*10**19)
printf("\n answer given in the book is wrong")