Answer:
The play started at 5:10 PM.
Explanation:
We are given the following in the question:
Length of first act = 45 minutes
Length of intermission = 55 minutes
Length of second act = 1 hour and 10 minutes
1 hour = 60 minutes
Thus, length of second act =

The second part ended at 8:00 PM. We have to find the starting time of play.
Starting time of play =

Thus, the play started at 5:10 PM.