SSC MTS practice question
A survey found that the number of smartphone users in a town became 90 times the number of users recorded a decade earlier. Using log 2 = 0.3010 and log 3 = 0.4771, find log 90.
From a SSC MTS Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (D) 1.9542
90 = 9 × 10 = 3² × 10. So log 90 = 2 log 3 + log 10 = 2(0.4771) + 1 = 0.9542 + 1 = 1.9542.
हिंदी में प्रश्न
एक सर्वेक्षण में पाया गया कि किसी कस्बे में स्मार्टफोन उपयोगकर्ताओं की संख्या एक दशक पहले दर्ज संख्या से 90 गुना हो गई। log 2 = 0.3010 तथा log 3 = 0.4771 का प्रयोग करके log 90 ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 1.9542
90 = 9 × 10 = 3² × 10. अतः log 90 = 2 log 3 + log 10 = 2(0.4771) + 1 = 0.9542 + 1 = 1.9542.
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