1995 AHSME Problems/Problem 5
Problem
A rectangular field is 300 feet wide and 400 feet long. Random sampling indicates that there are, on the average, three ants per square inch through out the field. [12 inches = 1 foot.] Of the following, the number that most closely approximates the number of ants in the field is
Solution
The rectangular field is 3600 inches wide and 4800 inches long, so it has an area of 17280000 square inches. We multiply by three to account for the ants: 51840000, which is closes to 50 million