One centimeter diameter$-$sized corn $($density of $1300K\frac{g}{c}u.m)$ is dried in a fluidized bed

drying system at $30$degC. If the measured pressure drop across a $0\mathrm{.}25m$ bed $($at

minimum fluidizing velocity$)$ was found to be $2000Pa,$ determine the minimum

fluidizing velocity using Ergun's method. Assume that at $30$degC, the viscosity of air is

$2{10}^{-5}Pa.s$ and the density of air is $1K\frac{g}{c}u.m$