RRB Technician Grade 3 practice question
Sushma, a trader in Bhopal, gives a customer buying kitchenware the choice of either paying Rs. 4000 in cash today, or Rs. 4900 after 15 months with no further charges. Both options are meant to be equally fair to Sushma. What annual rate of interest is implicit in this offer?
From a RRB Technician Grade 3 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (D) 18%
Here Rs. 4000 today is the present worth (PW) of Rs. 4900 due after T = 15/12 = 1.25 year, so TD = A - PW = Rs. 900. Using TD = PW×R×T/100, R = 100×TD/(PW×T) = 100×900/(4000×1.25) = 18% per annum.
हिंदी में प्रश्न
Bhopal के व्यापारी Sushma, रसोई के बर्तन खरीदने वाले ग्राहक को या तो आज नकद में Rs. 4000 चुकाने, या 15 महीने बाद बिना किसी अतिरिक्त शुल्क के Rs. 4900 चुकाने का विकल्प देते हैं। दोनों विकल्प Sushma के लिए समान रूप से उचित माने गए हैं। इस प्रस्ताव में निहित वार्षिक ब्याज दर क्या है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 18%
यहाँ आज का Rs. 4000, T = 15/12 = 1.25 वर्ष बाद देय Rs. 4900 का वर्तमान मूल्य (PW) है, अतः TD = A - PW = Rs. 900। TD = PW×R×T/100 सूत्र से, R = 100×TD/(PW×T) = 100×900/(4000×1.25) = 18% वार्षिक।
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