MathematicsThe population of a town is 20,000. If the annual birth rate of is 4% and annual death rate is 2% calculate the population after two years.

The population of a town is 20,000. If the annual birth rate of is 4% and annual death rate is 2% calculate the population after two years.


  1. A
    30808
  2. B
    20808
  3. C
    20000
  4. D
    None of these 

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    Solution:

    Concept- In order to solve the problem given above , first find the population increase and then find the final population after two years .
    Here,
    Annual birth rate=4%
    Annual death rate=2%
    And, net= +2%
    Then, the population after the 2 years will be,
    =1+0.022×20000
    =1.022×20000
    =1.0404×20000
    =20808
    Hence, the correct answer is option 2.
     
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