Question:
A sum becomes 3 times itself in 6 years at compound interest. In how many years will it become 81 times itself?
चक्रवृद्धि ब्याज पर कोई राशि 6 वर्षों में 3 गुनी हो जाती है। कितने वर्षों में यह 81 गुनी हो जाएगी?
Options:
- 24 years
- 18 years
- 30 years
- 36 years
- 24 वर्ष
- 18 वर्ष
- 30 वर्ष
- 36 वर्ष
Correct Answer: a)
Explanation:
\(81 = 3^4\). Time = \(4 \times 6 = 24\) years.
\(81 = 3^4\), अतः समय = \(4 \times 6 = 24\) वर्ष।