Question

13. The population of a town increases 4% annually but it is decreased by emigration annu
extent of
%. Find the increase per cent in three years.
2
[Hint: Increase in three years over 100 = 100*(1+
7
2 X 100
414. The nonulation
8
x{1+2 x 100
= 110.8718.)​

Answer 1

Answer:

Net increase in population in a year = (4− 1 2 )% = 3 1 2 % Let the original population of the town be 100. Then, Population after 3 years = 100(1+ 3.5 100 )3 = 100×207×207×207 100×100×100 = 110.87 ∴ % increase = (110.87 – 100)% = 10.87% = 10.8%Read more on Sarthaks.com - https://www.sarthaks.com/977844/the-population-town-increases-annually-but-is-decreased-emigration-annually-the-extent

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