I need help please A compoundreverted gearbox will be used t

I need help please.

A compound-reverted gearbox will be used to connect a hydro turbine to an electric power generator. The hydro turbine transmits 100 kW (~134hp) of power, at 2000 rpm, to the input shaft of the gearbox. The output of the gearbox must drive an electric power generator at 6000 rpm. The center distance for the gear pairs must not exceed 150 mm (or 6in). Design all four gears to avoid interference. All gears must have a reliability of 99%. Use fatigue factors of safety of 1.5 in bending, and 1.2 in surface-strength.

Solution

please find the link

http://nptel.ac.in/courses/112106137/pdf/2_2.pdf

it may be hellpful