Who should attend. The course is designed for those who may have to conduct or participate in an aircraft accident investigation. This may be in the role of official investigator for a State or as an accredited representative/technical advisor of a manufacturer, operator or service provider.
Before electronic calculators, converting square varas (at 1 vara = 32.8748 inches) to acres was a tedious job. But if 1 vara = 33 1/3 inches, 3 varas are exactly 100 inches, 36 varas are exactly 100 feet, and 108 varas are exactly 100 yards. An easy division and some shuffling of the decimal point do the job.
Answer Wiki. One story is about 15 feet (4.5 meters), including floor and ceiling structure and the headspace of the rooms. For a multiple-story building, estimate about 13 feet per floor, because one man's ceiling is another man's floor. Interior headspace standard is an 8-foot ceiling above the floor, without counting the floor or ceiling structures.