How long the world war 2 end?​

Explanation:

World War II or the Second World War, often abbreviated as WWII or WW2, was a global war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers.

6 years

Explanation:

Lasting six years and one day, the Second World War started on 1 September 1939 with Hitler's invasion of Poland and ended with the Japanese surrender on 2 September 1945.

what are local authorities doing to fix the problem

explanation:

a, both were musicians during the jazz age