How a ream of paper is determined?
A ream is a fixed unit of measure, currently set at 500 sheets of paper. At one time it was 480. A printer's ream is 516 sheets.
There are two conflicting units at work here. One is the ream as mentioned in the question and one is the quire. "Short" paper measurements insist that there are 24 sheets in a quire and 20 quires in a ream, therefore, "short" paper measurements give 480 sheets to a ream. Writing paper measurements give 25 sheets to a quire and 20 quires, therefore, 500 sheets, to a ream.
A ream of paper is 20 quires of paper. A quire is defined in different ways. As a number it is currently 25 sheets of paper, but formerly it was 24 sheets. So, if we assume that a quire is 25, and a ream is 20 quires, then a ream is 20 x 25, which is 500 sheets. All you have to do now is to find the weight of 1 sheet of paper and…