The Right to Vote and not to wait

In the previous two presidential elections in the United States, very long wait times have been witnessed at precincts (voting stations) in states that ultimately decided the election (Florida in 2000 and Ohio in 2004).

In Philadelphia as well, some voters complained about the long lines in some precincts, with most complaints coming from precinct A. In 2004, the average number of voters arriving at Precinct A was 35 per hour, and the arrivals of voters were random with inter-arrival times that had a coefficient of variation of 1 (Cva=1).

Philadelphia had deployed 1 voting machine in Precinct A. Suppose that each voter spent on average of 100 seconds in the voting booth (this is the time needed to cast her/his vote using a voting machine), with a standard deviation of 120 seconds.

1. How long on average did a voter have to wait in line precinct at A in 2004 before entering in a booth to cast her/his vote?