Two point charges of and placed apart exert a force on each other

PHYSICS · Subjective · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Two point charges of

+4\,\mu\text{C}

and

+3\,\mu\text{C}

placed

0.20\,\text{m}

apart exert a force

F

on each other. If the charges are changed to

+6\,\mu\text{C}

and

+9\,\mu\text{C}

respectively, at what separation should they be kept so that the magnitude of the force remains

F