Multiple choice

A sum of money is invested at a certain rate of compound interest payable annually. The interests in two successive years are Rs 225 and Rs 240 . Find the interest in third year ? एक राशि को चक्रवृद्धि ब्याज की एक निश्चित दर पर वार्षिक रूप से देय होने पर निवेश किया जाता है। लगातार दो वर्षों में ब्याज 225 रुपये और 240 रुपये है। तीसरे वर्ष में ब्याज ज्ञात कीजिये?

  1. 256

  2. 290

  3. 260

  4. 265

  5. 280

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A Correct answer
Explanation

In compound interest, interest increases by the rate each year. Interest year 1 = 225, interest year 2 = 240. Increase = 240 - 225 = 15. Rate = 15/225 = 1/15 = 6.67%. Interest year 3 = 240 + (240 × 1/15) = 240 + 16 = 256.