AMC 12A 2008 Problem 1

A bakery owner turns on his doughnut machine at 8:30 Am. At 11:10 AM the machine has completed one third of the day’s job. At what time will the doughnut machine complete the job?

Answer Choices
A. 1:50 PM
B. 3:00 PM
C. 3: 30 \mathrm{PM}
D. 4:30 PM
E. 5: 50 \mathrm{PM}