Why black women's hair grow slower than white women?

an African American's hair grows slower because of the strand being so curly. it coils in the hair follicle make the hair harder to come out. a cacausain woman's hair doesnt have the same texture and coil as of an African American's. if an African American would like their hair to grow a lil bit faster. you should get braid, corn rows to pull the hair out of that coil.