The population of a town is 1,76,400 . If it increases at the rate of

1.	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?
Answer» 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.

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?

Answer»

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.

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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?

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