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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