RRB Group D practice question
Amit had invested same amount of sums at simple as well as compound interest, compounded annually. The time period of both the sums was 2 years and rate of interest too was same 10% per annum. At the end, he found a difference of ₹97 in both the interests received. What were the sums (in ₹) invested?
From a RRB Group D Science practice set · Science
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Correct answer: (C) 9,700
For a 2-year period, CI − SI = P(r/100)². Here 97 = P×(10/100)² = P×0.01, so P = ₹9,700.
हिंदी में प्रश्न
अमित ने साधारण ब्याज और चक्रवृद्धि ब्याज (वार्षिक रूप से संयोजित) दोनों में समान राशि निवेश की थी। दोनों राशियों की समय अवधि 2 वर्ष थी और ब्याज दर भी समान 10% वार्षिक थी। अंत में, उसे दोनों से प्राप्त ब्याज में ₹97 का अंतर मिला। निवेश की गई राशियां (₹ में) क्या थीं?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 9,700
2 वर्ष की अवधि के लिए, CI − SI = P(r/100)² होता है। यहाँ 97 = P×(10/100)² = P×0.01, इसलिए P = ₹9,700।
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