Question

The population of a town increased by 10% per year in 2009, 2010, and 2011. If the population of the town at the beginning of 2009 was 40,000, what was it at the end of 2011?

Answer 1

If the population was 40,000 at the beginning of 2009, at the end of 2009 it has increased by 10% and became 44,000.

By the same way, at the end of 2010, it became
`44000 + (44000*10)/(100) = 48400`

At the end of 2011, the population was
`48400 + (48400 * 10)/(100) = 53240`