A wet cylinder of agar gel at 278 K containing a uniform concentration of urea of 0.1 kmol/m3 has a diameter of 28 mm and a length of 20 mm with flat parallel ends. The diffusivity is 4.72e- 10 m2 /s. If the cylinder is suddenly immersed in turbulent pure water, Calculate the concentration at x* = 0.5 and r* = 0.5 for both radial and axial diffusion after 96 hr.