Answer:
To find the population of the city 3 years from now, we need to calculate the population growth based on the given growth rate.
The population of the city at present is 50,000. With a growth rate of 10% per annum, the population will increase by 10% every year.
To calculate the population after 3 years, we can use the formula:
Population after n years = Present population × (1 + growth rate)^n
Where n is the number of years.
Using this formula, we can calculate the population after 3 years:
Population after 3 years = 50,000 × (1 + 0.10)^3
Population after 3 years = 50,000 × 1.10^3
Population after 3 years = 50,000 × 1.331
Population after 3 years = 66,550
Therefore, the population of the city 3 years from now will be 66,550.
The correct option is d. 66,550.