The Sun orbits the center of the Milky Way galaxy at a distance of about 25,000 to 28,000 light-years from the galactic center, completing one revolution in about 225–250 million years..The orbital speed is 220 km/sec, equivalent to one light-year every 1,400 years, and one AU every 8 days.
This is what wikipedia says : so it probably is 250 km/sec.
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