Hi Fred -
shame on you mixing standard measurments with metric ;~)
Just kidding.
But just for that you'll have to figure it out yourself!
If windspeed is 10km/h, and TSR is 5.5, then you know that in a 10km/h wind the tip of the blade is going around in a circle at 55Km/h.
And the diameter of the circle is 10', so you need to figure out the circumferance, (3.14 * the diameter)= 31.4'.
So if the tip is traveling 31.4'/revolution and it's going 55Km/h....