the population of a town is 176400 if it increases at, Percentage, General Mathematics

Question:The population of a town is 176400. 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 xx (1 +5/100)^2`

 = `(176400 xx 21/20 xx 21/20)` 

 = 194481.

 Population 2 years ago 

 = `176400/(1 +5/100)^2` 

 = `(176400 xx 20/21 xx 20/21)`

 = 160000.

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The population of a town is 176400. If it increases at the rate of 5% per annum, what will be its population 2 years hence ? What was it 2 years ago ?

Question:The population of a town is 176400. 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 xx (1 +5/100)^2` = `(176400 xx 21/20 xx 21/20)` = 194481. Population 2 years ago = `176400/(1 +5/100)^2` = `(176400 xx 20/21 xx 20/21)` = 160000.