Verified by Ajay Kumar
Find the amount if ₹6,400 is invested at 5% compound interest for 3 years.
₹7208.80
₹7408.80
₹7308.80
₹7008.80
Answer: B
Solution: \(A=P(1+\frac{r}{100})^n\). Thus, \(A=6400(1+\frac{5}{100})^3=6400(1.05)^3\) = ₹7408.80. Trick: Apply the 5% increase successively for all three years; compound interest is calculated on the updated amount each year.
यदि ₹6,400 को 5% वार्षिक चक्रवृद्धि ब्याज पर 3 वर्षों के लिए निवेश किया जाता है, तो मिश्रधन ज्ञात कीजिए।
₹7208.80
₹7408.80
₹7308.80
₹7008.80
उत्तर: B
हल: \(A=P(1+\frac{r}{100})^n\)। इसलिए \(A=6400(1+\frac{5}{100})^3=6400(1.05)^3\) = ₹7408.80। ट्रिक: तीनों वर्षों में क्रमशः 5% की वृद्धि लागू करें। चक्रवृद्धि ब्याज में हर वर्ष ब्याज सहित नई राशि पर ब्याज लगता है।
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