$1\mathrm{.}8$ Continuous sheet copper is made by electrodeposition from a solution containing $CuS{O}_4$ onto a rotating drum of lead. For the conditions given below, what should be the rotation speed of the drum $($revolution per hour$)?$

Cathode current density $=1750[(A)*m^{-2}]$

Current efficiency $=95\%$

Desired "thickness" $($mass per area$)=1\mathrm{.}22[(kg)*m^{-2}]$

Angle of cathode immersion $=165$