Answer:
r = 5.335 meters
Step-by-step explanation:
Given that,
Charge 1,

Charge 2,

Force of attraction between two charges, F = 6 N
The force of attraction between two charges is given by :
, r is the separation between two charges


r = 5.335 m
So, the separation between two charges is 5.335 meters. Hence, this is the required solution.