Population of a town for the year $2014 - 15$ was $3, 45, 470$ and that for the year $2015 - 16$ was twice of the preceding year. What was the net increase in population?

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Solution

Find the increase in population:
Population for year $2014 - 15$ $=$ $3, 45, 470$
Population for year $2015 - 16$ $=$ $2 \times 3, 45, 470$
$=$ $6, 90, 940$
Net increase in population $=$ Population for year $2015 - 16$ $-$ Population for year $2014 - 15$
$=$ $6, 90, 940$ $-$ $3, 45, 470$
$=$ $3, 45, 470$ .
Hence, the net increase in population will be $3, 45, 470$ .

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