What was Population 3 Yeas Ago? If

The population of city increase at the rate of 5% pa. If the present population of the city is 185220. What was its population 3 years ago.

  1. 181500
  2. 183433
  3. 160000
  4. 127783
vijay Professor Asked on 7th August 2015 in Maths.
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  • 1 Answer(s)

    Answer: (3) 160000

    Explanation:-
    The present population of city = 185220

    The population of city increase at the rate of 5 % p.a.
    Then, the population of a city  one year ago = 185220 x 100/105
    = 185220 x 20/21
    = 176400

    The population of a city two year ago = 176400 x 100/105
    = 176400 x 20/ 21
    = 168000

    The population of a city three years ago = 168000 x 100/105
    = 168000 x 20 / 21
    = 160000
    Then, the population of a city three years ago was 160000.

    Hence, the answer is (3) 160000.

    Anurag Mishra Professor Answered on 7th August 2015.
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