1. The problem statement, all variables and given/known data The problem is attached as an image. 2. Relevant equations R=integral(rho*D/A) I guess that there is more... 3. The attempt at a solution I got stuck stright on A), for I don't have a clue what to do with such a weird Rho value. Afterwords when we want to find E field - can't we just say E=v0/D ?