How long did David live?

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 long 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?