The mass of the body is found by simply weighing a person on a scale. The volume of the body is most easily and accurately determined by completely immersing a person in water and calculating the volume of water from the weight of water that is displaced (via underwater weighing).
Mailman Salary Statistics as of 2015. Average annual salary for a Mailman is $36600 based on statistics in the U.S. as of 2015. The highest salary recorded was $76765. The lowest salary reported was $15604. These figures will vary on a state to state basis as these are averages across all 50 states.
National Average. According to May 2011 data from the United States Bureau of Labor Statistics, postal service mail carriers earned an average yearly salarly of $51,390. The bottom 10 percent of carriers earned an average annual salary of $40,470, while the top 10 percent earn an average of $56,720.