Find The Population of 3 Years ago ? If

The population of a town increases by 5% every year. If the present population is 9261, the population 3 years ago was

  1. 5700
  2. 7500
  3. 8000
  4. 6000
Anurag Mishra Professor Asked on 12th August 2015 in Maths.
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1 Answer(s)
Best answer

Answer: (3) 8000

Explanation:-
The population of a town increases by 5% every year.
If the present population is 9261,

Then, the population of a town one year ago = 9261 x 100/105
= 9261 x 20 /21
= 441 x 20
= 8820

The population of a town two years ago = 8820 x 100/105
= 8820 x 20/21
= 420 x 20
= 8400
The population of a town three years ago = 8400 x 100/105
= 8400 x 20/21
= 400 x 20
= 8000
Then, the population of a town three years ago was 8000.

Hence, the answer is (3) 8000.

Anurag Mishra Professor Answered on 13th August 2015.
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