RRB Technician Grade 3 practice question
A girl walks from one end A to the other end B of a straight 800 m road in 2 minutes and then turns around and walks 200 m back to point C in another 1 minutes. What will be the average velocity (in m/s) of the girl in going from point A to point C?
From a RRB Technician Grade 3 Science practice set · Science
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Correct answer: (C) 3.33
Net displacement A to C = 800 - 200 = 600 m. Total time = 120+60 = 180 s. Average velocity = displacement/time = 600/180 = 3.33 m/s.
हिंदी में प्रश्न
एक लड़की एक सीधी 800 मीटर सड़क के एक छोर A से दूसरे छोर B तक 2 मिनट में चलता/चलती है और फिर मुड़कर 200 मीटर वापस बिंदु C तक अगले 1 मिनट में चलता/चलती है। A से C तक जाने में औसत वेग (मी/से में) क्या होगा?
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सही उत्तर: (C) 3.33
A से C तक शुद्ध विस्थापन = 800 - 200 = 600 मीटर। कुल समय = 120+60 = 180 सेकंड। औसत वेग = विस्थापन/समय = 600/180 = 3.33 मी/से।
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