Multiple choice

The population of a town increases at the rate of 15% per annum. If the present population is 108445 of town, then what was the population 2 years ago? एक शहर की जनसंख्या प्रति वर्ष 15% की दर से बढ़ती है। यदि शहर की वर्तमान जनसंख्या 108445 है, तो 2 वर्ष पहले आबादी क्या थी?

  1. 72000

  2. 79000

  3. 82000

  4. 85000

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Present population = 108445. Let population 2 years ago = P. P × (1 + 15/100)² = 108445. P × 1.3225 = 108445. P = 108445/1.3225 ≈ 82000. For backward calculation with growth rate, divide present value by (1 + rate)ⁿ.