The population of a town is 1,76,400 . If it increases at the rate of 5% per annum , what will be its population 2 years hence ? What was it 2 years ago?
Population after 2 years = 176400*[1+(5/100)]2
=[176400*(21/20)*(21/40)]
= 194481.
Population 2 years ago = 176400/[1+(5/100)]2
=[716400*(20/21)*(20/21)]
= 160000.
