Question

Industry rule of thumb for estimating crowds is one person takes up 2.5 feet how many would estimate at a 1 mile long parade with crowds on both sides 10 feet deep

Answer 1

To solve this problem, we will use the following expression:

$\frac{\text{total area}}{area\text{ per person}}.$

Now, in this case, the total area is:

$A=2(1\text{ mile}\cdot10ft).$

To be able to compute the area, we have to convert from miles to feet. Recall that:

$1\text{ miles=}5280\text{ ft.}$

Therefore:

$A=(2\cdot5280\cdot10)ft^2=105600ft^2.$

Substituting the above value in the expression, and area per person = 2.5 ft², we get:

$\frac{105600ft^2}{2.5ft^2}=42240.$

Answer:

$42240.$