A gardener uses a mower to cut a rectangular 80-foot by 120-foot lawn. The swath he cuts is 30 inches wide, but he overlaps each cut by 6 inches to make sure that no grass is missed. He walks at the rate of 4000 feet per hour while pushing the mower. Which of the following is closest to the number of hours it will take the gardener to mow his lawn?
1.0
1.1
1.2
1.3
1.4