RRB ALP practice question
A car travels 90 km at an average speed of 45 km/h and immediately returns along the same route covering the distance in 1.2 hour(s). What is the average speed of the car for the entire journey in m/s?
From a RRB ALP Science practice set · Science
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Correct answer: (C) 15.62 m/s
Time for onward journey = 90/45 = 2.00 h. Total distance = 180 km, total time = 2.00+1.2 = 3.20 h. Average speed = 180/3.20 = 56.25 km/h = 15.62 m/s.
हिंदी में प्रश्न
एक कार 90 किमी की दूरी 45 किमी/घंटा की औसत चाल से तय करती है और तुरंत उसी मार्ग से वापस लौटती है तथा यह दूरी 1.2 घंटे में तय करती है। पूरी यात्रा के लिए कार की औसत चाल मी/से में क्या है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
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सही उत्तर: (C) 15.62 m/s
जाने में लगा समय = 90/45 = 2.00 घंटा। कुल दूरी = 180 किमी, कुल समय = 2.00+1.2 = 3.20 घंटा। औसत चाल = 180/3.20 = 56.25 किमी/घंटा = 15.62 मी/से।
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