If the amount is 3³⁄₈ times the sum after 3 years at compound interest compounded annually, then the rate of interest per annum is :

यदि कोई धनराशि वार्षिक चक्रवृद्धि ब्याज के आधार पर 3 वर्षों का चक्रवृद्धि ब्याज जोड़कर 3³⁄₈ गुना हो जाए, तो ब्याज की वार्षिक दर है :

1. A16²⁄₃ %
2. B33¹⁄₃ %
3. C33 %
4. D50 %

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Correct answer: D. 50 %

Explanation

(1 + r)³ = 3 3/8 = 27/8, so 1 + r = 3/2 and r = 50%.

(1 + r)³ = 27/8, अतः 1 + r = 3/2 और r = 50%।