The production of bottles rose to 26000 from 16000 in 2 years. Find the rate of growth per annum.

The production of bottles rose to 26000 from 16000 in 2 years. Find the rate of growth per annum. 2 वर्षों में बोतलों का उत्पादन 16000 से बढ़कर 26000 हो गया। प्रतिवर्ष वृद्धि दर ज्ञात कीजिए।

Solution:

Let rate = r%

Using compound growth formula:

A = P(1 + r/100)²

26000 = 16000(1 + r/100)²

⇒ (1 + r/100)² = 26000 / 16000

⇒ (1 + r/100)² = 26 / 16

⇒ (1 + r/100)² = 13 / 8

⇒ 1 + r/100 = √(13/8) ≈ √1.625 ≈ 1.275

⇒ r/100 = 1.275 − 1

⇒ r/100 = 0.275

⇒ r ≈ 27.5%

Final Answer: 27.5% per annum

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