Charge is distributed uniformly throughout the volume of an infinitely long cylinder of radius $R=3\mathrm{.}00\times 10^-\mathrm{²}m.$ The charge density is $6\mathrm{.}00\times 10^-$²c/m³. What is the electric field at $r=1\mathrm{.}50\times 10^-\mathrm{²}\text{m }?$

What is the electric field at $r=6\mathrm{.}00\times 10^-\mathrm{² }\text{m }?$