Multiple choice

If the compound interest accrued on an amount of rs.12000 in two years is Rs. 1738.80 at the certain rate of interest .find the rate of interest. 12000 रु. की धनराशि पर किसी निश्चित ब्याज दर से 2 वर्ष में चक्रवृधि ब्याज 1738.80 रु. हो तो ब्याज दर ज्ञात कीजिए |

  1. 5%

  2. 7%

  3. 6%

  4. 7.5%

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

Using compound interest formula: CI = P[(1 + r/100)^2 - 1] = 1738.80. So 12000[(1 + r/100)^2 - 1] = 1738.80. Therefore (1 + r/100)^2 - 1 = 1738.80/12000 = 0.1449. Then (1 + r/100)^2 = 1.1449, giving 1 + r/100 = 1.07, so r = 7%. Option B is correct.

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