A piece of paper is 8.1 times 10^-5 m thick. Approximately how many pieces of paper are required to make a stack two metres high?

1 Answer
Nov 21, 2016

It would take approximately 24,691 pieces of this paper to get a stack 2 metres high.

Explanation:

Let's call the number of pieces of paper we are looking for $p$. We then can write our problem as:

$p \cdot \left(8.1 \times {10}^{-} 5 m\right) = 2 m$

$\frac{p \cdot \left(8.1 \times {10}^{-} 5 m\right)}{8.1 \times {10}^{-} 5 m} = \frac{2 m}{8.1 \times {10}^{-} 5 m}$

$p = \frac{2 m}{8.1 \times {10}^{-} 5 m}$

$p = \frac{2 m \times {10}^{5}}{8.1 m}$

$p = \left(0.246913 \times {10}^{5}\right)$

$p = 24691$