Multiple choice

A sum of money becomes Rs. 13380 after 3 years and Rs. 20070 after 6 years on compound interest the sum is – कोई धनराशि चक्रवृद्धि ब्याज पर 3 वर्ष के बाद 13380 रू. और 6 वर्ष के बाद 20070 रूपये हो जाती है तो वह धनराशि है?

  1. Rs. 9040

  2. Rs. 8890

  3. Rs. 8920

  4. Rs. 8800
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In compound interest, the amount after 3 years is P(1+r)^3 = 13380 and after 6 years is P(1+r)^6 = 20070. Dividing the second by first: (1+r)^3 = 20070/13380 = 1.5. So P = 13380/1.5 = Rs. 8920. Verifying: 8920 × 1.5 = 13380 (correct), and 8920 × (1.5)^2 = 8920 × 2.25 = 20070 (correct). Therefore, option C is correct.

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