About 10 ft 120in.
It's at least 30 feet of the ground because he goal post must be a minimum of 20 feet above the crossbar and the crossbar is 10 feet above the ground, so that would make the top of the goal post a...
120 yards. The field itself is 100 yards long, and the end zones are another 10 yards each.
120 yards, the end zones are each 10 yards long plus the 100 yards from the beginning of both end zones
120 yards