Multiple choice

Simple interest for a sum of Rs.1550 for 2 years is Rs.20 more than the simple interest for Rs.1450 for the same duration. Find the rate of interest? 1550 रू. पर 2 वर्षो का सा.ब्याज 1450 रू. पर इसी समय के सा. ब्याज से 20 रू. अधिक है। ब्याज की दर ज्ञात कीजिए?

  1. 5%

  2. 8%

  3. 10%

  4. 12%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The difference in simple interest comes from the difference in principal: Rs. 1550 - Rs. 1450 = Rs. 100. This extra Rs. 100 at rate R% for 2 years gives Rs. 20. So 100 × R × 2/100 = 20, which gives 2R = 20, so R = 10%.

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