a$)$ Calculate the efficiency of removal of a $2,5$m$-$diameter particle having density $1250$ kg$/$m$3$

for a cyclone barrel diameter of $1$m$.$ The gas flow rate is $2\mathrm{.}8$ m$3$

$/$s and the gas temperature is

$25$oC

b$)$ Redesign the system using a multi$-$cyclone system consisting of $10$ cyclone barrels.

Calculate efficiency of the system when each barrel has diameter of $0\mathrm{.}1$m$.$