RRB NTPC CBT-1 previous year question
A sum of money becomes ₹7,865 after 2 years and ₹8,651.50 after 3 years on compound interest at the same rate, compounded annually. Find the sum.
Asked in RRB NTPC 2026 — 17 June Shift 2 · Quantitative Aptitude
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Correct answer: (A) ₹6,500
The difference between the amount after 3 years and after 2 years equals one year's interest on the 2-year amount: 8651.50-7865=786.50, giving rate = 786.50/7865=10%. Principal = 7865/(1.1)2 = Rs6,500.
हिंदी में प्रश्न
एक धनराशि वार्षिक रूप से संयोजित होने वाले वार्षिक चक्रवृद्धि ब्याज की समान दर से 2 वर्षों में ₹7,865 और 3 वर्षो में ₹8,651.50 हो जाती है। वह धनराशि ज्ञात कोजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) ₹7,000
3 वर्ष और 2 वर्ष बाद की राशि का अंतर 2-वर्ष की राशि पर एक वर्ष के ब्याज के बराबर है: 8651.50-7865=786.50, जिससे दर = 786.50/7865=10%। मूलधन = 7865/(1.1)2 = 6,500 रुपये।
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