RRB NTPC CBT-1 previous year question
The difference in simple interest on a sum of money invested at 4% per annum for five years and for three years is ₹784. Find the simple interest (in ₹) on the same sum invested at the same rate of interest for eight years.
Asked in RRB NTPC 2026 — 15 June Shift 3 · Quantitative Aptitude
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Correct answer: (A) 3136
The difference in SI for 5 years and 3 years equals SI for 2 years, which is 784. So SI for 8 years = 784×(8/2) = ₹3,136 (since SI is directly proportional to time).
हिंदी में प्रश्न
किसी राशि को 4% वार्षिक दर से पाँच वर्ष और तीन वर्ष के लिए निवेश करने पर प्राप्त साधारण ब्याज में अंतर ₹784 है। उसी राशि को समान ब्याज दर पर आठ वर्ष के लिए निवेश करने पर प्राप्त साधारण ब्याज (= में) ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 3136
5 वर्ष और 3 वर्ष के साधारण ब्याज का अंतर 2 वर्ष के साधारण ब्याज के बराबर है, जो 784 है। अतः 8 वर्षों का साधारण ब्याज = 784×(8/2) = ₹3,136 है (क्योंकि SI समय के सीधे समानुपाती होता है)।
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