Mathematics for IGCSE & O level - Rates (Section 2 - No. 21)
The population of Waring is 60,000 in an area of 8 square kilometres. What is the population density?
7000 people/km²
7500 people/km²
8000 people/km²
8500 people/km²
Giải thích
PD = P/A. 60000/8 = 7500