SSC CGL Tier-II practice question
During a two-part motorcycle ride, Irfan drives the motorcycle at 40 km/h for the first half of the total time taken and at 60 km/h for the remaining half of the time. Find the average speed for the whole journey.
From a SSC CGL Tier-II Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (A) 50 km/h
When the time (not the distance) is equal for each speed, average speed = arithmetic mean = (a+b)/2 = (40+60)/2 = 100/2 = 50 km/h.
हिंदी में प्रश्न
दो भागों वाली मोटरसाइकिल यात्रा के दौरान, इरफ़ान कुल लगे समय के पहले आधे भाग में मोटरसाइकिल को 40 किमी/घंटा की चाल से और शेष आधे समय में 60 किमी/घंटा की चाल से चलाता/चलाती है। पूरी यात्रा की औसत चाल ज्ञात कीजिए।
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सही उत्तर: (A) 50 km/h
जब प्रत्येक चाल के लिए दूरी नहीं बल्कि समय बराबर हो, तो औसत चाल = समांतर माध्य = (a+b)/2 = (40+60)/2 = 100/2 = 50 किमी/घंटा होती है।
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