What is the magnitude of the surface charge density on each plate?

Complete Question

A parallel-plate air capacitor of capacitance 245 pF has a charge of magnitude 0.148μC on each plate. The plates are 0.328 mm  apart.What is the magnitude of the surface charge density on each plate?

The value  is  

Explanation:

Generally the surface charge density is mathematically represented as

Here  E is the electric field which is mathematically evaluated as

So substituting   for C ,  for  d and   for  Q we have

Hence

i would say the answer is food.

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