Calculating Torque for a Gearbox and Flywheel with an Efficiency of 92%

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To calculate the torque required at the input shaft of a gearbox and flywheel system with a 92% efficiency, first determine the output torque using the formula: output torque = input torque / gear ratio. Given that the output shaft rotates 5 times faster than the input shaft, the gear ratio is 5:1. The flywheel, with a mass of 50 kg and a diameter of 1.5 m, needs to accelerate from rest to 300 RPM in one minute, which requires calculating the angular acceleration and subsequently the torque. The final torque at the input shaft can then be derived by factoring in the efficiency of the gearbox.
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A gearbox and flywheel with a output shaft rotating in the opposite direction to the input shaft at 5 times it's speed. The gearbox has an efficiency of 92%
If the flywheel is solid has a mass of 50kg a diameter of 1.5m and is to accelerate from the rest to 300 revs min^-1 in 1minute

Can someone please show me how to calculate torque required at the input shaft please
 
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Hint: output torque = input torque / gear ratio
 

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