1. The problem statement, all variables and given/known data So I was looking at this site reading up again on Gauss's Law and was a tad confused http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elecyl.html 1st thing on the page... 2. Relevant equations 3. The attempt at a solution It states that the electric flux will just be the Electric field times the area of the cylinder... However in the calculation, the circumference of the cylinder is used...why is that?