A Charge of 3

Multiple Choice

A charge of 3.0 μC and a second charge are initially far apart.If it takes 29 J of work to bring them to a final configuration in which the 3.0 μC is at x = 1.0 mm,y - 1.0 mm,and the other charge is at x = 1.0 mm,y = 3.0 mm,find the magnitude of the unknown charge.(The value of k is 9.0  109 N·m²/C². )

A) 2.15 μC
B) 4.30 μC
C) 10.74 μC
D) 4.30 nC