From my general knowledge I know that David lived 70 years.
Can be this be demonstrated with the Bible?
In 1 Kings 2:10, 11 we find how much he reigned over Israel:
So David slept with his fathers, and was buried in the city of David.
And the days that David reigned over Israel were forty years: seven years reigned he in Hebron, and thirty and three years reigned he in Jerusalem.
So, how long did David live?