1. Use capacitance & dielectric relative permittivity to find A/d (plate area / separation)
2. Plug result into relationship between resistance, resistivity & A/d

The formulae are easily found from your textbook, or by searching "relative permittivity" and "resistivity" in Wikipedia.

Aren't you just ENABLING this guy by doing his work, and even pointing out how EASY it was ? Why do you bother? Great answer , by the way (which is why I chose to respond). I knew it was an area calculation.

"Aren't you just ENABLING this guy by doing his work, and even pointing out how EASY it was?"

Yes.

"Why do you bother?"

I'm just such a nice kinda guy .

More seriously, I generally ignore homework questions (or tell 'em to read the book/google it/ask Teach), unless I get the feeling that they've at least thought about the problem (that's how this one came across to me, at the time). Time was (early days of me in CR4) I'd do the whole thing, showing all the steps along the way, but I've realized that this was just an ego-trip and helped no-one.

On this one, I'd've liked to have spent a bit more time pointing in the right direction without giving too much away (I think I probably made it too easy - "Its an area calculation" type hints would've been better), but I was pressed for time _{^{(that's my story & I'm sticking to it!)}}.

If someone has a "real world" (i.e. not homework) problem, and I can help, I'll generally fall over myself trying.

We've all been occasionally blinded and cannot see the tree in the forest. I feel you answered the question admirably. A single hint followed by waiting for the student to grasp the thread works great in a student mentor relationship. Here you identified the path in terms he should remember and apply to similar questions in the future. But the student had to understand the meaning of the path description and then walk that path to get the answer.