Find out the surface charge density at the intersection of point x=3 m plane and x -axis, in the region of uniform line charge of 8 nC / m lying…

Find out the surface charge density at the intersection of point $\displaystyle x=3 \mathrm{~m}$ plane and $\displaystyle x$-axis, in the region of uniform line charge of $\displaystyle 8 \mathrm{nC} / \mathrm{m}$ lying along the $\displaystyle z$-axis in free space.