Hello,

Here, Q1 = 3.8 * 10^5 and Q2 = 5.5 * 10^4

Distance between them, r = 10*10^-2

According to Coloumb's law, force acting between two bodies having charged Q1 and Q2 placed r distance apart is given by:

F = 1/4(pie)(Epsilon) * (Q1*Q2)/r^2

Substituting the values in the above equation, we get:

F = (1/4 * 3.14 * 8.85 * 10^-12) * (3.8 * 10^5 * 5.5 * 10^4) / (10*10^-2)^2

F = 1.88 * 10^22 N (Answer)