Answer Posted / bharat

There is two types. .....
1 . Gear box
2 . Gear ratio.

For gearbox ratio you should know input rpm or torque and out put rpm or torque.

T1 / T2 = N2 / N1.

T1 = No. Of teeth on driven
T2 = No of teeth on driver
N2 = o/p rpm
N1 = I/p rpm

For finding gear ratio...

Ratio = T1 / T2.

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