Question

In
\[2016\], the city of Rio de Janeiro had a population density of

\[5377\,\dfrac{\text{people}}{\text{km}^2}\] .
What was the population density of Rio de Janeiro in people per square meter?

Answer 1

1 km^2 = (1000 m)^2 = 1,000,000 m^2, so divide by 1,000,000:

5377 people/km^2 = 5377/1,000,000 people/m^2 = 0.005377 people/m^2 (≈ 5.377×10^-3).