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Q4. An electric motor drives a pump through a reverted gear train as shown in Fig Q4.

All of the gears have the same pitch and the train has a velocity ratio of 24.

Transmission efficiency is 80 % developing a pump output of 80 kW at 125 rpm.

Calculate EACH of the following:

(a) the number of teeth in gears A and B;(8)

(b) the output torque of the motor;(6)

(c) the rotational speed of gear B. (2)