Multiple choice

The difference between the interest received by Anil and Ravi is Rs 120. When they invest Rs 2000 each for 3 years what is the difference in the rate of interest? अनिल और रवि द्वारा प्राप्त ब्याज के बीच अंतर 120 रुपये है, जब वे 3 वर्ष के लिए 2000 रुपये प्रत्येक निवेश करते हैं तो ब्याज दर में क्या अंतर है?

  1. 2%

  2. 7%

  3. 4%

  4. 6%
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A Correct answer
Explanation

Difference in simple interest = P*R1*T/100 - P*R2*T/100 = P*T*(R1-R2)/100. Given: 2000*3*(r1-r2)/100 = 120. So 60*(r1-r2) = 120, hence r1-r2 = 2%. The principal and time cancel out in the difference.

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