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.
People who have worked for five to 10 years can expect a higher median salary of $42K. On average, Postal Service Mail Carriers make $54K following one to two decades on the job. Postal Service Mail Carriers with more than 20 years of experience report incomes that are only modestly higher; the median for these old hands hovers around $56K.