What is the average speed of a cyclone?

I'm afraid your question is too vague to answer. First, it's unclear whether you're asking about the forward speed or the wind speed, and if you're talking about wind speed we'd need to know where in the cyclone you're talking about. Also, "cyclone" has various meanings: a general low pressure area, a tornado, a hurricane, etc. To answer the question we'd need to know which one you're talking about.