The population of a city increases at the rate of 10% per annum. If the population of the city was 2 crore in 2018, then the population of the city in the year 2021 was:

2.662 crore

Population of city in 2018 = 2 crore

According to question ,

Population of city in 2021 ,

= \(\frac{100+10}{100}\) × \(\frac{100+10}{100}\) ×  \(\frac{100+10}{100}\) ×  2

= \(\frac{11}{10}\) × \(\frac{11}{10}\) ×  \(\frac{11}{10}\) ×  2 

= 2.662 crore

So , population in 2021 is 2.662 crore.