Question

Can someone help me find the magnetic field in this problem..

Answer 1

A total current of 60 mA flows through an infinitely long cylinderical conductor of radius
6 cm which has an infinitely long cylindrical hole through it of diameter r centered at r/2
along the x-axis as shown.
What is the magnitude of the magnetic field at a distance of 18 cm along the positive x-
axis? The permeability of free space is 4pi ×
10^-7 T

Answer 2

Here is the picture.. (or atleast an attempt at it