How to calculate the rate of rotation, in revolutions per minute.

Calculate the rate of rotation, in revolutions per minute, of a space station which is 120 m. in diameter, if normal gravity (g = 9.8m/s) is maintained at the edge.

Could you explain what this question is asking as I’m not too sure and then how to answer this.

No it’s not homework it would be summer holidays anyway I just want to know.