charged particle physics question?

xt3rmin8_1987

New member
A charged particle is at the origin of coordinatees. the particle produces an electric field of 4(i hat) kN/C at the point with position vector 36(i hat)cm. At what location does the field hav the value 1(i hat) kN/C?

A)9 i hat cm
B)18 i hat cm
C)72 i hat cm
D)144 i hat cm
E)nowhere

E=fe/q0

i think its nine but im not sure can anyone help please, any help is appreciated
 
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