Question

The present population of the city increases each year by 4%of what it had been in the beginning of each year. Find The population 2 years hence The population 2 years ago

Answer 1

Let the population of the city 2 year ago be x

Population of the city 1 year ago = x + 4x/100

= 26x /25

Population of the city present year = 26x/25 + 4/100 × 26x/25

= 26x/625 + 26x/25

= [ 26x + (26x× 25)]/625

= [ 26x + 650x]/625

= 676x/625

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