Now we all know this is not STATED.....but Goku did take the life of a KAI.....KAI's live for a thousand years. Does that mean that Goku can live longer, since he's a saiyan that makes him age EVEN SLOWER. Not die due to age. Goku has the life force of a Kai within him....meaning that Goku, who's BODY was around 27 or 28 years old at the time can live on and stay young.
Not sure about Goku's age.
Not sure about Goku's age.