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a)Compute the charge per unit area on the conducting plate.

b)Compute the charge per unit area on the surfaces of the dielectric.

## The Attempt at a Solution

for part a). I used gauss's law for dielectric.

Q/A = K*epsilon_0*E = 3.60*8.85*10^-12*1.2*10^6 = 3.82*10^-5 C/m² which is correct.

However i haven't got a single clue how to do part b. But the answer is suppose to be 2.76*10^-5 C/m². Can someone please help me figure out how this answer was obtained?