Question:
The amounts at the end of the 3rd and 4th years on a certain sum at compound interest are ₹6,655 and ₹7,320.50 respectively. Find the rate of interest per annum.
एक निश्चित राशि पर चक्रवृद्धि ब्याज पर तीसरे और चौथे वर्ष के अंत में मिश्रधन क्रमशः ₹6,655 और ₹7,320.50 है। प्रति वर्ष ब्याज दर ज्ञात कीजिए।
Options:
- 9%
- 10%
- 12%
- 8%
- 9%
- 10%
- 12%
- 8%
Correct Answer: b)
Explanation:
Interest for the 4th year = \(7320.50 – 6655 = ₹665.50\).
Rate of interest = \(\dfrac{665.50}{6655} \times 100 = 10\%\).
चौथे वर्ष का ब्याज = \(7320.50 – 6655 = ₹665.50\)।
ब्याज दर = \(\dfrac{665.50}{6655} \times 100 = 10\%\)।