Tour-an-doe.
On average opera can be as long as an hour to three hours depending on the story.
5 hours No, the whole opera is less than 3 hours. The acts are approximately 30-40 minutes long, depending on the performance.
About 2 hours. You can get a Tosca DVD, running time 120 minutes. A performance at a theater will take a little longer, allowing for scene changes etc. See Related links below for more information.
No, Giacomo is Puccini's first name.