IBPS RRB Officer Scale-I Prelims practice question
A man covers a certain distance at 20 km/hr and returns the same distance at 80 km/hr. Find his average speed for the whole journey.
From a IBPS RRB Officer Scale-I Prelims Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (A) 32.0 km/hr
Average speed = 2xS1xS2/(S1+S2) = 2x20x80/(20+80) = 32.0 km/hr.
हिंदी में प्रश्न
एक व्यक्ति एक निश्चित दूरी 20 किमी/घंटा की चाल से तय करता है और वापस उसी दूरी को 80 किमी/घंटा की चाल से तय करता है। पूरी यात्रा के लिए औसत चाल ज्ञात करें।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 32.0 km/hr
Average speed = 2xS1xS2/(S1+S2) = 2x20x80/(20+80) = 32.0 km/hr.
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