Mathematics for IGCSE & O level - Rates (Section 1 - No. 33)
A town has a population of 200,000. Its population density is 10,000 people per square mile. What is the area of the town?
20 sq miles
50 sq miles
10 sq miles
30 sq miles
解释
Area = Number of people / Population density; 200,000 / 10,000 = 20