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The annual increase in the population of a town is 10%. If the present population of the town is 180,000, then what will be its population after two years?

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200000

210000

217800

207800

answer is C.

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Detailed Solution

It is given that the annual increase in the population of a town is 10%.
We need to find the population after 2 years.
Population after 1 year

= 180000 + 180000 \times \frac{10}{100}

\Rightarrow

Population after 1 year

= 180000 + 18000

\Rightarrow

Population after 1 year

= 198000

Population after 2 years

= 198000 + 198000 \times \frac{10}{100}

\Rightarrow

Population after 2 years

= 198000 + 19800

\Rightarrow

Population after 2 years

= 217800

So, the population after 2 years is 217800.
Hence, the correct option is 3.

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