A group of landless farmers invaded the farm Good Hope in the Mato Grosso, this farm was 240 m from the front and 12 km from bottom, and it was set up 8 per hectare activists.
How many people were settled in these lands?
Since you need everything in the same unit of measurement (I used m and m^2)
12km = 12,000m
1hectare = 10,000m^2
From this you need to find out the total area of the farm and then multiply by 8 to get the number of people
$\displaystyle \frac{12000m \times 240m}{10000m^2/hectare}$
$\displaystyle = 12 \times 24 = 288 hectares$
The people will be 288 hectares x 8 people/hectare = 2304 people
Dimensional Analysis is very handy for this kind of problem, it helped me understand :]