Multiple choice

The current population of a city is 11,02,500. If it has been increasing at the rate of 5% per annum, what was its population 2 years ago?

  1. 9,92,500

  2. 12,51,506

  3. 9,95,006

  4. 10,00,000
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Population 2 years ago = P / (1 + r/100)^n = 1102500 / (1.05)^2 = 1102500 / 1.1025 = 1,000,000.

AI explanation

Let the population two years ago be P. The present population equals P multiplied by 1.05 squared, so 1102500 equals P times 1.1025. Dividing 1102500 by 1.1025 gives the initial population P as 1000000.

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