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Please help me to find out the answer for the following question...!!!

When a train is running, wheels at both sides are rotating with a same

speed . So when it runs through a curve, the inner rail is having a small curvature than the outer rail. So Outer wheel has to travel a long distance than the inner wheel . So if both side's wheels are running with same speed, how it happens ? What is the magic here. Is it realted with Banking of curvature concepts. Please, anybody can provide some expert opinions for the above question..?

Thanks in advance..!!!

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# How train is travelling through a curve?

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