Multiple choice

A certain sum of money at certain rate of compound interest amounts to Rs 1,200 in 7 years and Rs 1,344 in 8 years. Find the rate of interest? एक निश्चित धनराशि, निश्चित चक्रवृद्धि ब्याज की दर से 7 वर्षों में 1200 रुपये तथा 8 वर्षों में 1344रु हो जाती है। ब्याज की दर ज्ञात कीजिये।

  1. 14%

  2. 15%

  3. 20%

  4. 10%

  5. None of these. इनमे से कोई नहीं
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

For compound interest, amount increases by (1 + r) each year. A₈/A₇ = 1344/1200 = 1.12. Therefore 1 + r = 1.12, so r = 0.12 = 12%. Rate is 12%, not in options A-D.

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