Given that:
- The box contains 5 reams of paper.
- One ream of paper is 500 sheets of paper.
Let be "x" the thickness of a ream of paper.
Knowing the number of sheets that one ream of paper contains, you can determine that the thickness of one sheet of paper is:
In this case, you need to estimate the thickness of 2 sheets of paper. Therefore, assuming that all the sheets have the same thickness, you need to multiply the thickness of one sheet of paper by 2:
Hence, the answer is: You could divide the thickness of one ream of paper by the number of sheets of paper a ream of paper has, in order to find the thickness of one sheet of paper, and then multiply the result by 2.