Sprinklers

Question

A farm with an area of 90.625 meters squared has to be covered with sprinklers. One sprinkler covers one meter and cost $1250. Another sprinkler costs $2000 but covers 1.25 meters. Come up with the cheapest way to cover the entire farm

Answer 1

Set this up as dimensional analysis. The area of the farm is the given quantity, while the cost to coverage ratio is your conversion factor. Hope that helps!