How can we calculate the speed of the output gear in a simple gear train? explain with the of an example.

Explanation:

In the diagram there three gears in which gear 1 is input gear ,gear 2 is idle gear and gear 3 is out put gear.

Lets take

All external matting gears will rotates in opposite direction with respect to each other.

So the speed of gear third can be given as follows

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