How do i solve this problem?

Question

how do i set and solve this problem

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Earth rotates on an axis through its poles. The distance from the axis to a location on earth 40 degree N latitude is about 3033.5 miles. therefore a location on on Earth at 40 degrees N latitude is spinning on a radius 3033.5miles . compute the lnear speed on the surface on the earth at 40 degrees latitude.

Answer 1

Speed = (2 pi R) / (24 hours)