The population of a city is 50,000 at present. It increases at the rate of 10% per annum. What will be the population 4 years from now?

73,205

Population at present = 50,000

Population after 1 year = 50,000 + 10% of 50,000 = 55,000

Population after 2 years = 55,000 + 10% of 55,000 = 60,500

Population after 3 years = 60,500 + 10% of 60,500 = 66,550

Population after 4 years = 66,550 + 10% of 66,550 = 73,205