Question

The width of a large, rectangular-shaped tree farm is $1.9$ kilometers. The length of the farm is $4.4$ kilometers. What is the best estimate of the area of the farm ?

Answer 1

Find the best estimation for the farm area:

Given, that the width of the tree farm's rectangular shape is $1.9$ kilometers.

The Farm's estimated width is $2$ kilometers$\left(\because 2\approx 1.9\right)$ and the length of the tree farm's rectangular shape is $4.4$ kilometers.

So, the Farm's estimated length is $4$ kilometers $\left(\because 4\approx 4.4\right)$.

Round figures to the nearest integer when making estimations.

Substitute the values in the formula $\begin{array}{rcl}\mathrm{Estimated}\mathrm{Area}\mathrm{of}\mathrm{the}\mathrm{Farm}& =& \mathrm{Estimated}\mathrm{width}\times \mathrm{Estimated}\mathrm{length}\end{array}$:

$\begin{array}{rcl}\mathrm{Estimated}\mathrm{Area}\mathrm{of}\mathrm{the}\mathrm{Farm}& =& 2\times 4\\ & =& 8\mathrm{square}\mathrm{kilometers}\end{array}$

Hence, the best estimate of the area of the farm is $8$ square kilometers.