RRB Technician Grade 3 practice question
On a certain sum, if at the same rate of interest, in 2 years, the simple interest is ₹64 and the compound interest is ₹72, then what is the sum (in ₹)?
From a RRB Technician Grade 3 General Awareness practice set · General Awareness
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Correct answer: (C) 128
SI in 2 yrs: PR/50=64 so PR=3200. CI−SI = PR²/10000 = 8, so R² = 80000/P. Using R=3200/P: P×(3200/P)²=80000 gives P = 128.
हिंदी में प्रश्न
िकसी िनि«त रािश पर , यिद समान ाज दर से , 2 वष का साधारण ाज ₹64 और चक्रवृ द्ध ाज ₹72 है , तो वह रािश (₹ म' ) ात कीिजए।
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उत्तर और व्याख्या देखें
सही उत्तर: (C) 128
2 वर्ष का साधारण ब्याज: PR/50=64, अत: PR=3200। CI−SI = PR²/10000 = 8, इससे P = 128 मिलता है।
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