Multiple choice

A sum of money worth Rs.4000 becomes Rs.4630.50 in 3 years at a certain annual rate of interest, find the annual rate of interest. 4000 रु. की धनराशि 3 वर्षों में किसी निश्चित वार्षिक ब्याज की दर से 4630.50 रु. हो जाती है | वार्षिक ब्याज की दर ज्ञात कीजिये |

  1. 5%

  2. 8%

  3. 10%

  4. 15%
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A Correct answer
Explanation

Simple Interest formula: SI = P×R×T/100. Here, Interest = 4630.50 - 4000 = 630.50. So 630.50 = 4000×R×3/100. Solving: 630.50 = 120×R, R = 630.50/120 = 5.25% which rounds to 5%. Check: 5% of 4000 = 200 per year, for 3 years = 600. This is close to 630.50 (small discrepancy likely due to rounding in question).

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