For a 1.1 km radious cylinder, find the time for one revolution if "gravity" at the surface is to be 9/8m/s^2.

I changed 1.1km= 1100m
Then I used the equation a=v^2/r to calculate the velocity.
the square root of: 1100 x 9.8= 103m/s
I guess my confusion is how to find time... (I also know that 2pi is one revolution)

Never mind i just used one rev=365 days and so on to get seconds...