A concentric compound gear train has four gears mounted on three shafts as shown below, with the teeth numbers as given. The output shaft is coupled to a conveyor belt pulley requiring a power input of $119\mathrm{.}0kW,$ while the input shaft is driven at is driven at $920\mathrm{.}0$ RPM$.$ There is negligible friction torque on the input shaft.

If both the intermediate and output shaft experience the same friction torque, and the gearbox efficiency is $99\mathrm{.}1\%,$ calculate the magnitude of this friction torque, expressing your answer in units of $Nm$ to one decimal place.

Selected Answer:

$[$None Given$]$

Correct Answer:

$18\mathrm{.}7+-0\mathrm{.}1$