Question

A student has 500 identical, rectangular sheets of paper. The mass of 1.0 m2
of the paper is
0.080 kg.
(a) Using a metre rule, she measures the length of one sheet of paper and its width. The length is
0.300 m and the width is 0.210 m.
(i) Calculate the mass of one sheet of paper.

Answer 1

The mass of one sheet of paper is

$$m=\rho A=\rho ab$$

$$m=(0.08)(0.3)(0.21)=0.00504\ kg=5.04\ g$$