Brain teasers

[font=Arial][color=#000099]A 30 year old man married a 25 year old woman. She died at age 50[/color][/font]
[font=Arial,Helvetica][color=#000099]and her husband was so devastated that he cried for years. Ten[/color][/font]
[font=Arial,Helvetica][color=#000099]years after he stopped crying, he died. If he had lived to be 80,[/color][/font]
[font=Arial,Helvetica][color=#000099]how many years was he a widower?[/color][/font]