Multiple choice

If Rs. 20 is the difference of simple interest and compound interest, for two years, at 4 percent per annum, then the principal is- यदि किसी धनराशि पर 4% वार्षिक दर पर 2 वर्षों के साधारण ब्याज और चक्रवृद्धि ब्याज का अंतर 20रू. हो तो वह धनराशि कितनी है?

  1. Rs. 12000

  2. Rs. 12500

  3. Rs. 13000

  4. Rs. 13500
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The difference between compound interest and simple interest for 2 years at rate r% is given by P*r²/100². Here, difference = Rs. 20, r = 4%, so 20 = P * 4² / 100² = P * 16 / 10000. Therefore, P = 20 * 10000 / 16 = Rs. 12500. Option B is correct. The calculation follows the standard formula: CI - SI for 2 years = P(r/100)².

Keep practicing — related questions