According to Wikipedia (usually correct but not always), Cheryl (James) Wray (aka Salt) is 46, Sandra Denton (aka Pepa) is 41 and Deidra "Dee Dee" Roper (aka Spinderella) is 39. There is a discrepancy however on Sandra Denton's age, as the Internet Movie Database (www.imdb.com) has her at 46. She was born in Kingston, Jamaica, so that could be the source of the discrepancy. Given the two sources, I would generally trust imdb.com more as it is widely used by media, agents and others in the industry. Salt N Pepa formed in 1986, so if Wikipedia is correct, Salt would have been 22 and Pepa would have been 17, which, while not impossible, seems more unlikely.
The legendary rap and hip hop artists Salt and Pepa now Cheryl Wray and Sandra Denton along with Dee Dee Roper better known as Spinderella are now 42 years old. They are still to this day the best selling female rap act.