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Home Questions & Answers Aptitude Mental Ability Question Answers If the present population of a state is 27500 and after 2 years it increases to 40931, then what is the rate of increase per year

    If the present population of a state is 27500 and after 2 years it increases to 40931, then what is the rate of increase per year

  • 25%
  • 10%
  • 17%
  • 13%
  • 22%
  • Explanation:

    Let the rate of increase per year be r%

    According to question,

    40931=27500[1+r/100]2

    ⇒ 40931/27500=[1+r/100]2

    ⇒ 1.4884=[1+r/100]2

    ⇒ 1.22=1+r/100

    ⇒ r/100=1.22-1

    ⇒ r=0.22×100

    ⇒ r=22%