AP Police SI previous year question
AC is the diameter of a circle and diagonal of inscribed quadrilateral ABCD with AB=30, CD=10, BC=40. Area (sq. units) of ABCD is
Asked in AP Police SI Prelims: 2018 (Paper I & II) · Quantitative Aptitude
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Correct answer: (C) 100(6+√6)
Since AC is diameter, ∠ABC=∠ADC=90°. AC²=30²+40²=2500→AC=50. AD²=2500−100=2400→AD=20√6. Area = ½(30×40)+½(10×20√6) = 600+100√6 = 100(6+√6).
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हिंदी में प्रश्न
AC एक वृत्त का व्यास है और अंतर्निहित चतुर्भुज ABCD का विकर्ण भी है, जिसमें AB=30, CD=10, BC=40 है। ABCD का क्षेत्रफल (वर्ग इकाई) है
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 100(6+√6)
चूंकि AC व्यास है, ∠ABC=∠ADC=90°। AC²=30²+40²=2500→AC=50। AD²=2500−100=2400→AD=20√6। क्षेत्रफल = ½(30×40)+½(10×20√6) = 600+100√6 = 100(6+√6)।
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