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**Genius in physics wanted!!!**

I have this question that i tried to solve for ages now and i still can't figure it out, in other word help would be very much appreciated.

QUESTION: The earth's radius is 6400km. How fast is a point on the equator moving? What is the speed of Beirut at latitude 34º?

The answer in the back of my book says i.) 465.4 m/s, ii.)385.6 m/s.

The question is from the book on advanced physics from Steve Adams and Jonathan Allday (topic 3.1 q.5)

Thank you very much,to who ever it is,that can help me