Answer: Population densities are 27547 and 8087 respectively.
Explanation:
Since we have given that
Census of New York city:
Area = 302.64 sq. miles
Number of population = 8336697
Population density is given by

Census of London :
Area = 469 sq. miles
Number of population = 3792621
Population density is given by

Hence, Population densities are 27547 and 8087 respectively.