IBPS PO Prelims practice question
A train travels from Chennai to Coimbatore via Vellore and Salem. It covers Chennai-Vellore (138 km) at 69 km/h, Vellore-Salem (160 km) at 80 km/h, and Salem-Coimbatore (165 km) at 55 km/h. Find the average speed of the train for the entire journey from Chennai to Coimbatore.
From a IBPS PO Prelims Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (A) 66.14 km/h
Time for leg 1 = 138/69 = 2 h; leg 2 = 160/80 = 2 h; leg 3 = 165/55 = 3 h.
Total distance = 138+160+165 = 463 km.
Total time = 2+2+3 = 7 h.
Average speed = 463/7 = 66.14 km/h.
हिंदी में प्रश्न
एक ट्रेन चेन्नई से कोयंबटूर तक वेल्लोर और सलेम होते हुए जाती है। यह चेन्नई-वेल्लोर (138 किमी) की दूरी 69 किमी/घंटा से, वेल्लोर-सलेम (160 किमी) की दूरी 80 किमी/घंटा से, और सलेम-कोयंबटूर (165 किमी) की दूरी 55 किमी/घंटा से तय करती है। चेन्नई से कोयंबटूर तक की पूरी यात्रा के लिए ट्रेन की औसत चाल ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 66.14 किमी/घंटा
चरण 1 का समय = 138/69 = 2 घंटे; चरण 2 = 160/80 = 2 घंटे; चरण 3 = 165/55 = 3 घंटे।
कुल दूरी = 138+160+165 = 463 किमी।
कुल समय = 2+2+3 = 7 घंटे।
औसत चाल = 463/7 = 66.14 किमी/घंटा।
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